Network Services Ports

Groove RPC

GLRPC stands for Groove Lightweight Remote Procedure Call, a proprietary protocol used by the Groove Collaboration software suite, which was later integrated into Microsoft SharePoint Workspace before its discontinuation. It facilitated real-time communication, synchronization, and data sharing within Groove's peer-to-peer workspace environment.

Jetnet

Paradigm Research & Development Jetnet utilizes port 6543 primarily for communication between its networked devices and systems. This port facilitates device management, telemetry, and control functions within Jetnet deployments, leveraging the UDP protocol for lightweight, efficient message exchange. Although unofficial, it remains important in industrial and research environments where Paradigm's products are utilized.

TeamViewer

TeamViewer is a widely-used remote access and desktop sharing application that enables users to connect to and control remote computers over the internet with minimal configuration. It facilitates secure remote support, collaboration, and file transfer between systems across various platforms.

Winbox MikroTik Admin

*MikroTik's Winbox* is a Windows-based utility used predominantly to configure and manage MikroTik RouterOS devices via TCP port 8291. It provides a graphical management interface that complements other access methods like SSH, Telnet, and an integrated web UI, offering administrators comprehensive and user-friendly device control.

WhiskerControl Protocol

WhiskerControl is a research-focused control protocol utilized primarily in experimental and prototype networks or robotics systems. It facilitates communication and coordination between various research components, enabling data transfer, command execution, and system monitoring capabilities.

Microsoft Global Catalog (GC)

Port 3268 is primarily used by Microsoft Domain Controllers to provide access to the Global Catalog service. This service allows fast searches across an entire Active Directory forest using LDAP. It contains a partial, read-only replica of all objects in the directory, facilitating user logins, address book lookups, and efficient query capabilities in large, multi-domain environments.

Microsoft EPMAP

Microsoft Endpoint Mapper (EPMAP), commonly operating on port 135, serves as the RPC (Remote Procedure Call) locator service. It allows clients to identify network services available on a Windows host, facilitating communication with components like DHCP, DNS, WINS, and Distributed Component Object Model (DCOM). By mapping UUIDs to network addresses, EPMAP acts as a directory, enabling dynamic discovery of RPC services essential for remote management and inter-process communication in Windows environments.

Tatsoft Default HTTP Proxy

Port 3128 is commonly associated with HTTP proxy services, such as those configured as default client connections in industrial automation platforms like Tatsoft. It serves as an intermediary port facilitating client communication, content filtering, or network access control, enabling efficient data transfer and protocol management for connected client applications. This port is frequently used by transparent and explicit proxy servers in enterprise or industrial environments.

Squid Proxy HTTP

Port 3128 is commonly used by proxy servers, notably Squid, for handling HTTP web caching and proxy services. It enables improved web performance by caching frequently accessed content and provides anonymity and filtering capabilities for clients accessing the internet through the proxy.

HTTP Alternate

Port 8080 is a widely used alternative to the default HTTP port 80. It is often utilized for web proxies, caching servers, and development or administrative web interfaces running on non-root privileges. Its versatility makes it prevalent in web server management and testing environments, especially when the default port 80 is already occupied or restricted.

Dropbox LAN Sync

Dropbox LAN Sync utilizes TCP and UDP port 17500 to efficiently synchronize files between Dropbox clients on the same local network, enabling accelerated file sharing without relying solely on internet connectivity.

Apple Filing Protocol

AFP (Apple Filing Protocol) is Apple's proprietary file services protocol primarily used on macOS systems. Operating over TCP port 548, it facilitates secure and efficient sharing, browsing, and file management within a Macintosh network environment. AFP supports advanced features like Unicode filenames, fine-grained access control, extended file attributes, and file locking, ensuring compatibility and user collaboration within Apple-based networks.

Telnet

_Telnet is an unencrypted, text-based protocol operating over TCP port 23, primarily utilized for remote command-line access to network equipment and servers. Its simplicity allows administrators to manage systems by directly interfacing with their command-line shells; however, due to the lack of security features such as encryption and strong authentication, it has largely been superseded by more secure alternatives._

Omron FINS Communication

Port 9600 is primarily used for Omron FINS (Factory Interface Network Service) communication to interface with Omron Programmable Logic Controllers (PLCs). It allows various industrial devices and software components to communicate seamlessly on a factory floor, facilitating data acquisition, device control, and automation processes using the FINS protocol over UDP.

IdeaFarm Door Protocol

The IdeaFarm Door Protocol utilizes UDP port 902 for communication purposes, mainly associated historically with the IdeaFarm software systems. Though it is officially registered, the protocol is obscure and largely deprecated, primarily serving as a proprietary communication channel. Its presence on modern networks is rare, and most contemporary uses of port 902 relate instead to VMware services over TCP, not UDP, which can sometimes lead to confusion during network assessments.

IdeaFarm Door

Port 902 is officially assigned to IdeaFarm Door, a self-documenting service where sending a single byte (0x00) prompts an informational response. This mechanism allows clients to quickly understand the service's capabilities. The port is primarily used over TCP, and it is part of legacy systems with niche deployment, seldom encountered in mainstream environments today.

NSClient Monitoring Agent

NSClient++ (also known as NSClient or NC_Net Client) is a monitoring agent designed primarily to extend the functionality of popular network monitoring solutions such as Nagios, OP5, and Opsview. It enables the collection, aggregation, and distribution of performance metrics, health status information, and service checks from Windows-based systems, facilitating comprehensive infrastructure monitoring.

CDDB Protocol Alternate

Port 8880 is an alternate port traditionally used by the CD DataBase Protocol (CDDBP), which allows music player software to query CD metadata databases such as Gracenote. It typically uses UDP communications, enabling client software to fetch details like album names, artist information, and track listings without direct user input.

Vuze HTTPS Tracker

Port 7000 is commonly used by Vuze BitTorrent client as the default for its built-in HTTPS tracker, which facilitates secure peer coordination within torrent swarms. This port helps establish encrypted connections for tracker communications, ensuring data privacy and integrity during content distribution.

VMware vSphere Management

Port 902 is primarily used by VMware vSphere for communication between the vSphere Client, ESXi hosts, and VMware management agents. It facilitates remote management, tasks automation, and host operations. The port enables secure communication pathways for remote console access, management functionalities, data transfers within VMware infrastructures, and integration with vCenter Server for centralized management.

ETL Service Manager

Port 9001 is commonly associated with ETL (Extract, Transform, Load) Service Manager processes. These services facilitate the management, scheduling, and monitoring of ETL workflows, which move and transform data between systems and databases. The port supports both TCP and UDP protocols, enabling flexible communication with ETL tools and applications across networks.

Symon Event Engine

Symon Communications Event and Query Engine operates over HTTP, enabling event delivery, monitoring, and query capabilities for enterprise communication systems. It's primarily used within Symon software solutions for managing real-time data feeds, alerts, and communication workflows, often in environments needing rapid message dissemination and operational insight.

VMware Console UDP

UDP port 902 is primarily used by VMware Server Console for communication between the managed VMware server and the management console. It enables important service functions like remote management, control, and monitoring of virtual infrastructure, ensuring administrators can maintain oversight of VMware environments efficiently through network communications.

Iperf

Iperf is a widely used network benchmarking tool designed to measure the maximum achievable bandwidth on IP networks. Supporting both TCP and UDP protocols, Iperf enables detailed network performance assessments, including throughput, delay, jitter, and data loss statistics. It’s commonly utilized by network administrators and engineers to diagnose network bottlenecks and optimize performance across various network topologies.

OPC UA TCP

OPC Unified Architecture (OPC UA) is a machine-to-machine communication protocol for industrial automation developed by the OPC Foundation. It is designed to facilitate the secure and reliable exchange of data in industrial control systems, supporting complex data modeling while remaining platform-independent.

H.323 Signaling

TCP port 1720 is primarily used for H.323 call signaling, a protocol suite widely employed for real-time voice, video, and data conferencing over IP networks. It manages the setup, control, and termination of interactive communication sessions, enabling interoperability across diverse VoIP and multimedia conferencing equipment. This port facilitates the initial connection negotiation between endpoints before media streams are established.

Microsoft Global Catalog SSL

Port 3269 is used by Microsoft's Global Catalog service operating over SSL/TLS encryption. This port facilitates secure access to a forest-wide directory in Active Directory, enabling encrypted LDAP searches that span multiple domains. Utilizing SSL ensures sensitive directory queries and authentication details remain protected during transmission.

HTTP RPC Endpoint Mapper

Port 593 is primarily used for Remote Procedure Call (RPC) communications over HTTP, facilitating DCOM (Distributed Component Object Model) services within Microsoft ecosystems. It enables client-server communication, component activation, and method invocation, typically in distributed enterprise applications and Exchange servers. Since it multiplexes RPC traffic over HTTP, it also helps traverse firewall restrictions while maintaining interoperability between networked services.

Apple Remote Desktop Reporting

Port 3283 is primarily used by Apple Remote Desktop (ARD) for reporting and status communication between managed Mac clients and the administrator console. Historically linked to Apple's Net Assistant utility, it facilitates efficient status updates and task execution monitoring within ARD environments.

FilePhile Relay

FilePhile Master/Relay operates over UDP port 8080, facilitating peer-to-peer file transfers with a master/relay mode that helps clients communicate indirectly. It is an unofficial usage of port 8080, which is commonly used as an alternative HTTP port, but serves here as a medium for efficient, distributed file sharing.

DBGp Proxy

DBGp Proxy is a debugging protocol proxy port that facilitates communication between Integrated Development Environments (IDEs) and debugging engines. It acts as an intermediary, enabling multiple connections, and streamlining remote or distributed debugging sessions for scripting languages, such as PHP or Python.

Oracle SSL Listener

Port 2484 is primarily used by Oracle Database systems to accept SSL-encrypted client connections to the Oracle Net Listener service. This secure communication channel ensures confidentiality and integrity of data transmitted between Oracle clients and the database server.

Commplex-Link

**Commplex-Link** is a port commonly utilized for generic network communication by various embedded devices and legacy systems. While initially registered for specific communication hardware, many software applications repurpose this port for diagnostic interfaces, proprietary protocols, and testing network throughput.

Men & Mice DNS

Men & Mice DNS services enable centralized, unified management of complex DNS infrastructures, integrating traditional DNS with modern network demands. This port facilitates DNS protocol communication specific to Men & Mice products, supporting efficient IP address management and enhancing visibility over DNS traffic.

Mikrotik MNDP

The MikroTik Neighbor Discovery Protocol (MNDP) enables MikroTik RouterOS devices to detect and share information with nearby MikroTik routers on the same network segment. It facilitates device management by providing insights about device identities, IP details, and network topology, making administration straightforward for network operators.

McAfee Web Gateway Proxy

Port 9090 is commonly used as the default proxy port for McAfee Web Gateway, formerly known as Webwasher or Secure Web. It facilitates secure web filtering, malware scanning, content inspection, and access control for corporate networks, acting as an intermediary between users and the external internet to enforce organizational security policies.

Tor Network

Port 9001 is widely used as a default unencrypted relay port for the Tor anonymity network, facilitating encrypted internet traffic routing through volunteer-operated nodes. It enables data exchange between Tor relays, helping maintain user privacy and circumvent censorship.

Mac OS X Server Admin

Port 660 is utilized primarily for the remote management and administration of Mac OS X Server instances. It serves as a communication endpoint for macOS administrators to configure, monitor, and troubleshoot macOS server systems. This port helps facilitate administrative access and management functions, often through dedicated Apple utilities or command-line tools.

Cisco XRemote

Port 9001 is traditionally associated with Cisco's XRemote router configuration, primarily utilized for device management and remote console access over serial interfaces. It facilitates administrative operations on Cisco routers, providing a means to configure, troubleshoot, and maintain network infrastructure remotely, especially in legacy network environments.

Kerberos Admin

**Kerberos administration** typically uses port 749 to perform administrative tasks such as managing principals, policies, and key databases within a Kerberos authentication infrastructure. This port facilitates secure and centralized identity management for distributed network environments.

LogMeIn Hamachi

LogMeIn Hamachi is a VPN tunnel software used to connect securely to a mediation server, allowing users to create virtual networks over the internet.

MIT ML Device

Port 83 is allocated to the MIT ML Device protocol, historically associated with early MIT research networking hardware. While not widely adopted in modern production environments, it sometimes appears in legacy systems or specialized academic projects. Due to its limited current use, detailed information is sparse, but it represents an example of early experimental network protocol assignments.

OpenPGP Keyserver

Port 11371 is primarily used by OpenPGP HTTP key servers, which facilitate the distribution, retrieval, and synchronization of public encryption keys. This enables a global infrastructure where users can upload or search for OpenPGP public keys to verify digital signatures, exchange secure messages, and support encrypted communication. These servers generally operate over HTTP, creating a public directory of keys to foster secure and trusted communications among users and services.

McAfee Web Gateway HTTP GUI

TCP port 4711 is primarily used as the default HTTP port for the graphical user interface (GUI) of McAfee Web Gateway 7. This management console allows administrators to configure, monitor, and maintain the web security appliance. Although unofficial and unencrypted by default, understanding and securing access to this port is important, as it offers significant control over web traffic filtering and security policies within an organization.

Microsoft-DS / SMB

Port 445 is primarily used for Microsoft Directory Services (Microsoft-DS), supporting file sharing, printer sharing, and access to Active Directory via the Server Message Block (SMB) protocol over TCP. It has replaced older NetBIOS ports, facilitating more efficient direct communication, and is widely deployed across Windows environments for seamless network resource access.

IBM Netcool Impact HTTP

Port 5104 is primarily used by IBM Tivoli Netcool/Impact, a key policy-driven analytics and event management component within the IBM Tivoli system management suite. It typically hosts an HTTP service for receiving API calls, handling event processing, and integrating operational data to support real-time decision-making and automation.

TheosNet-Admin

TheosNet-Admin on port 2501 facilitates communication for The sMessenger client connections. This service enables administrative management and instant messaging functionalities within Theos systems, serving both as a command and control interface and messaging relay point.

Miralix Phone Monitor

Miralix Phone Monitor is typically used in conjunction with call center and telephony solutions to monitor, control, and manage interactions across multiple communication channels. It facilitates the integration of telephony events, allowing tracking and oversight of phone use within enterprise environments.

Hypack Data Acquisition

Port 15000 is primarily used by Hypack Hydrographic Software’s data acquisition module to facilitate communication between hardware and software components involved in marine surveying and hydrographic data capture. It typically manages connections and data flow for devices performing tasks such as depth sounding, positioning, and mapping, playing a critical role in precise data gathering and control during hydrographic surveys.

Panda AdminSecure Agent

Panda Software AdminSecure Communication Agent operates on port 19226, enabling centralized management and communication between Panda's security console and agent endpoints within an enterprise environment. This port facilitates reporting, updates, deployment of security policies, and coordination of security services to ensure consistent protection across all connected systems.

SMB over Microsoft-DS

Port 445 is primarily used for Microsoft Directory Services (Microsoft-DS), which facilitates file sharing, network browsing, and network communication via the Server Message Block (SMB) protocol over TCP/IP without requiring NetBIOS. It is essential for Windows-based file and printer sharing and is widely used in corporate environments for resource sharing and network management.

ACMSODA

**ACMSODA** is a registered network port used primarily by the ACMSoda protocol or application, which facilitates communication between clients and servers for specialized data exchange or device control. Its typical use is within specific vendor software or custom applications, rather than general-purpose internet communication.

tcpnethaspsrv

tcpnethaspsrv is a network service used primarily to facilitate license management and copy protection for software utilizing the HASP (Hardware Against Software Piracy) dongle system developed by Aladdin Knowledge Systems. It allows software applications to communicate with hardware dongles over TCP/IP networks, enabling centralized licensing control and enforcement.

IMAP

Internet Message Access Protocol (IMAP) enables email clients to access, manage, and synchronize email messages stored on a remote mail server. Unlike older protocols like POP3, IMAP allows users to view their mailbox contents from multiple devices while keeping messages on the server, maintaining consistent state across platforms. IMAP supports functions such as folder management, message searching, selective download, and flagging, providing a comprehensive solution for modern email management as defined in RFC 3501.

ASF-RMCP

ASF Remote Management and Control Protocol (ASF-RMCP) is a standardized protocol enabling remote monitoring, management, and control of computer systems and devices at the platform hardware level. Primarily used by IT administrators, ASF-RMCP facilitates out-of-band management for devices regardless of their operating system status, making it valuable for maintenance, troubleshooting, and asset administration.

SSH

<p><strong>Secure Shell (SSH)</strong> is a widely-used network protocol designed to provide secure access and communication with remote systems over an unsecured network. It encrypts login credentials, command execution, file transfers, and tunneling capabilities, making it a fundamental tool for system administrators and developers to securely manage servers and devices.</p>

Xadmin Control Daemon

Xadmin Control Daemon is a network service typically employed for managing system configurations, device administration, or internal service management. It provides administrators remote capabilities to monitor, control, and update system parameters via both TCP and UDP protocols. While not a widely standardized service, it enables flexible network management that can be adapted by different organizations based on their internal needs.

Pichat Server

Pichat Server operates on port 9009 and is utilized as part of a peer-to-peer (P2P) chat application suite. It facilitates the real-time exchange of messages directly between clients without relying on centralized infrastructure. Designed primarily for instant communication, its P2P nature offers benefits such as reduced server overhead and potentially enhanced privacy compared to centralized services.

AppleTalk Routing

AppleTalk Routing Maintenance (RTMP) port is used for maintaining and updating routing tables within AppleTalk networks. This service facilitates route discovery, management, and the dissemination of route updates ensuring seamless data delivery across interconnected Apple devices. Primarily, it helps routers to advertise their network reachability and adapt to topology changes dynamically.

NAT-PMP

NAT Port Mapping Protocol (NAT-PMP) enables client devices behind a NAT gateway to configure dynamic port mappings automatically, simplifying inbound connection management. This improves connectivity for services such as peer-to-peer applications, gaming, and remote access without manual network configuration. Operating over both TCP and UDP, it allows devices to communicate their requirements directly to the NAT device to facilitate seamless data exchange while maintaining a level of security and network segmentation.

Oracle TNS Listener

Port 1521 is commonly used by Oracle Database for its Transparent Network Substrate (TNS) Listener service, which handles incoming client connection requests, database communication, and service management. It's a critical component in enterprise database environments.

Google Talk Voice & Video

Port 19302 is primarily used by Google Talk services for establishing voice and video call connections. It's widely utilized in Google's WebRTC infrastructure, which enables browsers and mobile applications to communicate in real-time using peer-to-peer connections. This port is essential in facilitating media negotiation and relay through Google's STUN servers, helping traverse NATs and firewalls for seamless user experience.

Modbus Protocol

Port 502 is primarily associated with Modbus, a widely used industrial automation protocol. It facilitates communication between supervisory computers, controllers, and field devices like PLCs over TCP/IP networks.

WSDAPI

**Web Services for Devices API (WSDAPI)** enables automatic discovery and communication between connected devices in a network, streamlining device management and integration on **Windows Vista, Windows 7, and Windows Server 2008** systems. This protocol simplifies the interaction between PCs and network-enabled devices such as printers, scanners, and cameras by utilizing **web service standards** like SOAP to provide plug-and-play functionality.

AMLFilter Admin

Port 21001 is typically used by AMLFilter Inc.'s AMLFilter application as the default administration interface port for its anti-money laundering filtering software. This interface allows security and compliance administrators to configure filters, manage rulesets, review alerts, and maintain the system for regulated financial institutions.

Audition FAM DB

Port 18206 is primarily associated with Audition Online Dance Battle, specifically the AsiaSoft Thailand server's Family (FAM) database. It facilitates communication and data exchange related to player groups, rankings, and social features within the game environment. The port supports both TCP and UDP protocols to ensure efficient data transfer and near real-time multiplayer gameplay experiences.

Zephyr Notification Service (hm-serv)

Port 2105 is utilized for the Zephyr Notification Service, specifically for Project Athena, facilitating communication with the host manager service (hm-serv). Although port 2102 is the preferred port for such communication, port 2105 might be encountered in certain configurations or legacy setups to support messaging and notification delivery within academic or research environments originally developed at MIT.

Audition Dance Battle Status Check

Port 18505 is primarily used by Nexon's Audition Online Dance Battle game client for status inquiries and version verification with the game server. It facilitates the initial connection phase to ensure players have compatible client versions and to retrieve server availability and updates prior to gameplay. The port supports both TCP and UDP protocols, allowing flexible communication during these checks.

Source Engine Server

Port 27015 is widely used by game servers running Valve's GoldSrc and Source engines. It allows multiplayer connection handling for popular games like Counter-Strike, Team Fortress, and Half-Life. The port facilitates client-server communications, server queries, and matchmaking. Although primarily associated with gaming, the port's openness can sometimes expose servers to attacks if not properly secured.

Audition Online SEA Server Check

Port 18300 is used by Audition Online Dance Battle, specifically AsiaSoft's Southeast Asia servers, for client-server status and version verification. It facilitates communication during login to ensure the client’s game version is compatible with the server and confirms server availability before gameplay begins. As this port supports both TCP and UDP, it serves multiple handshake and lightweight messaging functions essential for game connection stability.

Oracle DB Listener

Port 1521 is the default network listener port used by Oracle Database systems for client-server communications. The listener process manages incoming client connections, routing them to the appropriate database services. It plays a critical role in database connectivity, administration, and high-availability features for Oracle environments.

CAPWAP Data

CAPWAP Data on port 5247 facilitates the management and provisioning of wireless access points by carrying encapsulated wireless data packets between controllers and APs. Defined by RFC 5415, it separates data from control traffic (usually on port 5246) to maintain efficient wireless network operations, enabling scalability, flexibility, and simplified management.

BitTorrent Tracker

Port 6969 is typically associated with BitTorrent trackers, which coordinate the distribution of files shared through the BitTorrent peer-to-peer (P2P) file-sharing protocol. Trackers help manage connections between peers by maintaining a list of active clients sharing a specific file, facilitating efficient data exchange during downloads.

Netnews Administration System

**NAS (Netnews Administration System)** is a protocol designed to manage and facilitate the administration of Usenet newsgroups, allowing for efficient control of news server configurations, moderation settings, and distribution policies. Operating over both TCP and UDP, it assists administrators in maintaining the integrity and smooth operation of news distribution networks.

IPSec

Internet Protocol Security (IPSec) is a suite of protocols designed to secure IP communications by authenticating and encrypting each IP packet in a communication session. It is widely used to establish secure VPNs, protecting data traffic over untrusted networks, including the internet. Port 1293 is specifically assigned for the IPSec Network Address Translation-Traversal (NAT-T), facilitating IPSec operation behind NAT devices.

Infowave Mobility

Infowave Mobility Server is a communication middleware designed to enable secure, efficient data synchronization and connectivity for mobile applications accessing enterprise resources. Often used to facilitate messaging between mobile clients and backend servers, it optimizes data delivery in environments with intermittent connectivity. Its role is vital in maintaining robust communication channels essential for enterprise mobile workflows.

Smartlaunch Server

TCP port 7831 is the default port used by Smartlaunch, an Internet café management software, to facilitate server communication, client control, and administration functions. This port helps connect client PCs with the server backend to manage billing, monitoring, software deployment, and remote administration within a café environment.

SqueezeCenter CLI

Port 9090 is primarily used for Logitech Media Server's Command Line Interface (CLI), previously known as SqueezeCenter. This service allows external applications and scripts to communicate with and control media streaming, playback, and library management tasks. While unofficial, it's widely adopted for remote server management due to its flexible command structure.

Kaspersky Network Agent

Kaspersky Network Agent is a key component in Kaspersky's security infrastructure, facilitating communication between managed security products and the central administration server. It enables remote deployment, configuration, monitoring, and updates of security policies, ensuring seamless management of endpoints across an organization.

Opsware Satellite

Port 3001 is primarily associated with Opsware Satellite Servers, a component of the Opsware (later HP Server Automation) suite for managing large-scale server infrastructures. This port typically facilitates remote management and automation tasks, enabling administrators to deploy software, enforce compliance, and orchestrate system configurations seamlessly across many servers.

knetd Demultiplexer

knetd is a network service used primarily as a Kerberos protocol multiplexer or demultiplexer, which assists with forwarding different Kerberos-related traffic streams to the correct local service. It facilitates enhanced management of authentication services across distributed systems leveraging Kerberos security.

NameServer (ARPA Hostname)

Port 42 was historically assigned to the Host Name Server Protocol (NameServer), a part of the ARPA Network designed to manage and resolve hostnames in early networking environments, predating more modern DNS protocols. Though largely obsolete today, understanding this port helps contextualize the evolution of network naming solutions.

Big Brother Monitor

Big Brother is an early system and network monitoring solution that provides real-time status reports for hosts and network services. Administrators use it to track service uptime, detect failures, and get alerts on changes or outages, helping maintain system reliability.

DNS

DNS (Domain Name System) commonly utilizes port 53 to translate human-readable domain names into numerical IP addresses essential for internet communication. While most DNS queries occur via UDP for efficiency, TCP is used for tasks that require reliability, such as zone transfers and larger query responses. DNS acts as the backbone of internet navigation, enabling users to access websites and services seamlessly by resolving hostnames into routable addresses.

DCE/RPC Endpoint Mapper

_Port 135 is primarily used by Microsoft RPC Endpoint Mapper, a crucial function for locating network services used by Windows systems and DCE/RPC frameworks. It facilitates communication between clients and available services by helping clients determine what dynamic ports specific RPC services are listening on._

GTP (GPRS Tunneling Protocol)

**GPRS Tunneling Protocol (GTP)** is an IP-based protocol primarily used within 2G, 3G, and 4G mobile networks to manage subscriber data sessions and carry user data. Operated mostly over UDP, it facilitates data tunneling between network nodes such as SGSNs, GGSNs, MMEs, and PGWs, enabling mobile subscribers to access internet services while roaming or at home.

DHCPv6 Client

DHCPv6 Client is the Dynamic Host Configuration Protocol designed specifically for IPv6 networks. It automates the process of assigning IPv6 addresses and other configuration details to client devices, enabling seamless integration into IPv6-enabled networks. Unlike its IPv4 counterpart, DHCPv6 implements certain protocol-level improvements, including prefix delegation and improved multicast communication, to accommodate the unique requirements of IPv6.

Ascom Timeplex BRE

The Ascom Timeplex Bridge Relay Element (BRE) facilitates data transfer and management between communication networks. It is primarily used to interconnect various network segments and streamline the relay of data across WAN infrastructures, enhancing network interoperability for enterprise environments.

WS-Discovery

Web Services Dynamic Discovery (WS-Discovery) is a multicast discovery protocol primarily used in Windows environments for detecting network devices and services dynamically. It enables automatic service discovery without manual configuration, facilitating efficient communication between devices such as printers, cameras, and other network-enabled appliances.

DNS RNDC

Port 953 is primarily used by the Remote Name Daemon Control (RNDC), a command utility for controlling the BIND DNS server. It facilitates secure, authenticated communication between administrators and the DNS server, enabling remote management tasks such as reloading zone files and flushing caches. RNDC operates over both TCP and UDP, and by default listens on TCP port 953, providing administrators fine-grained control over DNS server operations.

Softros LAN Messenger

Softros LAN Messenger is a secure, serverless instant messaging application designed primarily for intra-office communication within a local area network. It supports one-to-one messages, group chats, broadcast notifications, and file transfers, enabling efficient, encrypted collaboration without exposing sensitive data outside the organization.

WINS

WINS (Windows Internet Name Service) is a Microsoft NetBIOS Name Server legacy service used primarily for name resolution on Windows networks. It enables clients to register and resolve NetBIOS names to IP addresses, facilitating easier communication in older Windows domain environments.

Microsoft RDP

Remote Desktop Protocol (RDP) is a proprietary protocol developed by Microsoft to provide a graphical interface for remotely connecting to another computer or server. Commonly used by system administrators and remote users, RDP allows full control over Windows systems across networks, enabling maintenance, troubleshooting, or remote work capabilities. Despite being a widely deployed remote access solution, RDP can expose systems to significant security risks if incorrectly configured.

SOCKS Proxy

Port 1080 is traditionally used for the SOCKS proxy protocol, a flexible proxy mechanism enabling network clients to route traffic through intermediary servers. It supports various types of network connections, providing anonymity, bypassing restrictions, or improving security by acting as a relay between networks.

DNSIX

**DNSIX** (DoD Network Security for Information Exchange) facilitates secure attribute-based access control within Department of Defense networks, enabling attribute token mapping to govern data exchange securely across interconnected systems.

Odette FTPS

Odette File Transfer Protocol over TLS/SSL (OFTP over TLS) is a secure communication protocol primarily used within the automotive industry and related supply chains in Europe. It facilitates secure, reliable file transfers between suppliers, manufacturers, and business partners by leveraging encrypted connections to protect sensitive business documents.

Ericsson Account Manager

Ericsson Account Manager (AVIM) is a proprietary management interface used by Ericsson telecommunications systems for account, identity and access management functions across network components.

Apache JServ Protocol (AJP)

Port 8009 is primarily used by the Apache JServ Protocol (AJP), which facilitates communication between web servers like Apache HTTP and servlet containers such as Apache Tomcat. It enables the passing of requests and responses efficiently and is commonly used for load balancing and proxying dynamic content. As a binary protocol, AJP is faster than traditional HTTP forwarding, but improper configuration may expose applications to security risks.

Zephyr Notification Service

Port 2103 is primarily associated with the Zephyr Notification Service developed under MIT's Project Athena. This service enables real-time messaging and notification delivery across distributed computing environments, allowing users to receive alerts, chat, and status updates.

McAfee Agent Discovery

*McAfee Network Agent uses UDP port 6646 primarily for local network device discovery. This facilitates the detection of other endpoints running McAfee software, potentially to optimize internal communication such as update distribution or peer management.*

Lantronix RS-485 Telnet Control

Port 9999 is commonly used by Lantronix device servers like the UDS-10 and UDS100 for remote Telnet configuration and management of serial-to-Ethernet converters, particularly those supporting RS-485 communication. This port allows network administrators to connect to the embedded Telnet service to configure network settings, serial parameters, or perform diagnostics on the device remotely.

IPSec NAT Traversal

Port 4500 facilitates IPSec VPN connections across network devices using NAT by encapsulating ESP packets within UDP to traverse NAT gateways seamlessly. Defined in RFC 3947, it extends IPSec capabilities for real-world networks where NAT is prevalent, ensuring secure communications remain intact. NAT-T allows enterprises and remote workers to maintain encrypted IPSec tunnels reliably over varied and complex network topologies.

IBM AIX NIM

IBM AIX Network Installation Manager (NIM) facilitates the installation, maintenance, and management of IBM AIX operating system images over a network. It streamlines large-scale deployments by automating installation tasks, making system management more efficient and scalable for enterprise environments utilizing IBM's UNIX-based systems.

LDAPS

LDAPS, or Lightweight Directory Access Protocol over TLS/SSL, is an encrypted form of LDAP that facilitates secure communication between directory service clients and servers. It operates over standard port 636 and is widely used in enterprise environments for secure directory queries, authentication, and management, ensuring sensitive data remains confidential during transmission.

SCOM Agent

Microsoft System Center Operations Manager (SCOM), previously known as Microsoft Operations Manager (MOM), uses this port for its agent communications. The agent provides monitoring capabilities by collecting event logs, performance data, and alerts from managed systems, enabling centralized infrastructure management for Windows environments.

Hydranode TELNET Control

Hydranode is a modular, multi-network peer-to-peer client, with its TELNET control interface allowing remote management and diagnostics of eDonkey2000 network activity. This control channel provides commands to oversee file transfers, monitor network status, and configure client behavior.

SCOL Name Service

Port 1200 is primarily utilized by the SCOL 3D virtual worlds platform for world name resolution services, enabling clients to discover and connect to 3D virtual environments. It acts as a directory service that facilitates interactions within SCOL's interactive and immersive spaces.

Miralix License Server

Port 3000 is commonly used by the Miralix License Server, a management service that handles licensing, authentication, and authorization for Miralix communication and contact center solutions. It facilitates client applications' validation requests to ensure legitimate access to licensed features and modules.

Commplex Main

Port 5000, known as Commplex Main, is a versatile port primarily associated with common network communications. It is used by various services, development frameworks, and applications for handling web and API traffic, remote administration interfaces, and network testing. Due to its flexible nature, this port often serves as a default or fallback listening port for many applications, making it prevalent in diverse environments.

BackupExec

Symantec Backup Exec commonly uses port 10000 for its data transmissions, particularly via the Network Data Management Protocol (NDMP). This service facilitates backup, recovery, and data management between servers and backup storage devices, enabling streamlined enterprise data protection. Its prevalence across backup environments makes it an important yet potentially vulnerable port if not secured properly.

BFCP

Binary Floor Control Protocol (BFCP) facilitates the management of additional media streams, such as content sharing, during SIP-based video conferencing sessions. Standardized as RFC 4582, it allows participants to coordinate multiple video channels by establishing speaker or content presentation privileges, enhancing collaboration capabilities in environments that require structured media control. This port is also utilized as a preferred port for SIP PUBLISH messages to Cisco Unified Presence Servers (CUPS).

Backup Exec Browser

Port 6101 is primarily used by the Backup Exec Agent Browser service, which facilitates communication and discovery of Backup Exec agents on a network. It assists in managing backup operations across multiple systems by enabling the central Backup Exec server to locate, enumerate, and coordinate backup agents efficiently.

L2TP & L2F

Layer 2 Forwarding Protocol (L2F) and Layer 2 Tunneling Protocol (L2TP) are technologies primarily employed for creating Virtual Private Network (VPN) tunnels by encapsulating data for secure transmission across IP networks. L2TP, often used in conjunction with IPSec for encryption, has largely supplanted L2F, which was an earlier Cisco-developed protocol. These protocols operate at the data link layer, enabling secure communication of PPP frames beyond point-to-point physical connections.

VNC Viewer Listener

Port 5500 is primarily associated with Virtual Network Computing (VNC) in 'listening' mode, allowing a server-side VNC viewer to wait for remote client connections. This facilitates reverse connections for remote desktop sharing and remote support. Standard VNC normally involves the client connecting to the remote server, but in some deployments, the server initiates a connection back to a listening viewer to bypass firewalls and NAT restrictions.

RADIUS Authentication (Cisco/Juniper)

Port 1645 was traditionally used for RADIUS authentication messages by vendors like Cisco and Juniper. As a protocol, RADIUS (Remote Authentication Dial In User Service) facilitates centralized Authentication, Authorization, and Accounting (AAA) for accessing network resources, widely adopted in network access servers, wireless controllers, VPNs, and more. Despite newer official port allocations, port 1645 remains in use in certain legacy or vendor-specific deployments.

TBRPF Protocol

Topology Broadcast based on Reverse-Path Forwarding (TBRPF) is a proactive link-state routing protocol designed primarily for wireless mesh and mobile ad hoc networks (MANETs). It efficiently disseminates routing information with minimal overhead, enabling rapid route establishment and adaptation in dynamic network topologies. By broadcasting topology updates along reverse paths, it ensures reliable delivery while reducing redundant transmissions.

IMP Logical Address Maintenance

Port 51, designated for IMP Logical Address Maintenance, historically supported communication within ARPANET Infrastructure by facilitating management and maintenance of IMP (Interface Message Processor) logical addressing. Though now largely obsolete, it played a crucial role in early network routing and device management tasks.

RTPS DDS Discovery

RTPS Discovery protocol, integral to DDS, facilitates real-time, low-latency automatic discovery of publishers and subscribers in distributed real-time systems, ensuring seamless communication setup without manual configuration. It enables flexible and scalable data sharing ideal for IoT devices, robotics, defense, and industrial automation applications.

HP Support Automation

Port 5814 is used primarily by Hewlett-Packard OpenView's Support Automation tools, including Self-Healing Services. These services enable remote diagnostics, automated issue detection, and streamlined support workflows for enterprise IT environments. The primary goal is seamless system management with proactive problem resolution.

MSSQL Monitor

Microsoft SQL Server Monitor port facilitates database discovery and management via the SQL Server Resolution Service. It primarily helps clients locate SQL Server instances and dynamically negotiate ports. This port supports both TCP and UDP, allowing flexibility in network environments. Given its influential role in discovery, it's often a target during reconnaissance, requiring careful management and security controls.

RTPS DDS Traffic

RTPS (Real Time Publish Subscribe) DDS User-Traffic is primarily used for real-time data distribution in distributed systems using the Data Distribution Service (DDS) protocol. This port facilitates efficient, scalable publish-subscribe communication patterns, supporting both TCP and UDP, commonly found in mission-critical, time-sensitive environments such as robotics, autonomous vehicles, industrial automation, and IoT deployments.

Symantec BindView UNIX Mgmt

Port 1236 is utilized by Symantec BindView Control, a security and compliance management solution primarily for UNIX systems. This port serves as the default TCP endpoint for communication between UNIX agents and the central management server, facilitating policy distribution, data collection, and reporting.

Service Location Protocol

The Service Location Protocol (SLP) enables devices to discover services available on a local network dynamically and without prior configuration. It simplifies network management by providing a scalable, flexible, and decentralized mechanism to advertise and locate services, such as printers or file servers, reducing the need for manual setup. SLP supports both TCP and UDP communications to ensure compatibility and resilience across diverse network environments and topologies.

SSDP / UPnP Discovery

Port 1900 is primarily used by the Simple Service Discovery Protocol (SSDP), which is a part of the Universal Plug and Play (UPnP) suite of protocols. It facilitates the discovery of network devices and services on local networks without the need for manual configuration, enabling seamless interoperability among diverse devices such as printers, smart TVs, media servers, and IoT devices.

DHCPv6 Server

Port 547 is utilized by the Dynamic Host Configuration Protocol version 6 (DHCPv6) server to allocate IPv6 addresses and configuration data dynamically to clients within an IPv6 network environment. It facilitates automatic network configuration, enabling devices to communicate seamlessly without manual IP address assignments.

HP Insight Manager Web

Port 2381 is the default port used by HP Insight Manager's embedded web server interface. This management tool allows administrators to remotely monitor, control, and maintain Hewlett-Packard servers and hardware. Access via an HTTP-based browser interface simplifies system management and offers visibility into hardware status, configuration, and alerts.

Netwall Emergency Broadcasts

UDP Port 533 is primarily used by the Netwall service, designed for transmitting emergency broadcast messages across networks. It enables fast and reliable alert dissemination in crisis scenarios, supporting critical infrastructural communication with minimal delay.

IEEE-MMS-SSL

IEEE-MMS-SSL is a secure implementation of the IEEE Media Management System, leveraging SSL encryption to manage, transfer, and control media content across networks safely. It facilitates secure communication in environments dealing with digital media storage, processing, or distribution, typically used within industrial, research, or specialized broadcast applications requiring encrypted data exchange.

UDPCast

UDPCast is a network tool designed for efficient multicasting of disk images or large files across a LAN, leveraging UDP transport. It enables simultaneous data distribution to many clients without saturating network resources, which is especially useful for cloning systems or rapid software deployment.

FTP Control

Port 21 is primarily used for FTP (File Transfer Protocol) command and control communications, facilitating file transfer sessions between a client and server. It manages authentication and commands that initiate data transfers on a separate data port.

Oracle Management Agent

Oracle Management Remote Agent is used by Oracle Enterprise Manager for remote administration, monitoring, and management of Oracle databases and related infrastructure. It enables administrators to securely execute management tasks and collect performance data across distributed Oracle environments.

MQTT Broker

MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed for small sensors and mobile devices optimized for high-latency or unreliable networks. It operates over TCP/IP, facilitating publish/subscribe messaging ideal for IoT applications, enabling efficient data exchange with minimal bandwidth consumption.

Kaspersky Control Center

Port 8086 is primarily utilized by the Kaspersky Anti-Virus (AV) Control Center, which facilitates centralized administration and management of Kaspersky security solutions across networked devices. This management portal enables system administrators to deploy updates, monitor endpoint status, and configure security policies from a single dashboard.

LogMeIn Hamachi

LogMeIn Hamachi is a popular virtual private network (VPN) application that allows users to create secure, encrypted peer-to-peer connections over the internet. It uses dedicated mediation servers to establish and manage VPN tunnels between clients. Port 12975 is typically used by the Hamachi client to communicate with the mediation server, facilitating network creation and management. If communication via this port is unavailable, Hamachi may attempt to use alternative ports or fallback to SSL protocols to maintain connectivity.

Oracle Listener (Unsecure)

Port 2483 is utilized by Oracle databases as the designated unencrypted listener port, replacing the default port 1521 in some configurations. This port facilitates communication between Oracle clients and the database server when SSL or other encryption mechanisms are not enforced. It enables initial connection establishment and orchestration of SQL query execution over TCP or UDP protocols without transport-level security.

IPX

IPX, or Internetwork Packet Exchange, is a network layer protocol used primarily in Novell NetWare environments to facilitate internetwork communication and routing. It was widely adopted within enterprise local area networks (LANs) during the late 1980s and 1990s before the dominance of TCP/IP. IPX provides connectionless datagram service that offers fast and efficient data delivery between nodes on a network.

SAP Router

SAP Router is an application-level proxy used within SAP environments to securely route traffic and connections between SAP clients and servers. It acts as an intermediary that regulates network communication, enabling organizations to protect internal SAP systems by controlling external access without exposing sensitive systems directly to untrusted networks.

Modbus

Modbus is an industrial communication protocol designed to enable communication between devices connected on different types of buses or networks, primarily in automation and control environments. It facilitates data transmission between supervisory computers and devices like PLCs, sensors, and instrumentation, making it a fundamental protocol in industrial control systems.

MonkeyCom

MonkeyCom is a communication port associated with IoT devices and embedded systems, primarily within the Xiaomi ecosystem. It is known to facilitate device management, communication, and often supports proprietary messaging protocols. Devices such as IoT gateways, smart sensors, and cameras may use this port for local discovery, data exchange, and remote control services.

Gnutella P2P

Port 6346 is primarily used by the Gnutella peer-to-peer (P2P) file sharing network, which enables decentralized sharing of files across anonymous participants. Popular applications such as FrostWire, LimeWire, and Shareaza have historically leveraged this port to facilitate connections, searches, and transfers without reliance on central servers.

NRPE

The NRPE (Nagios Remote Plugin Executor) protocol is commonly used by Nagios monitoring software to execute plugins and commands on remote hosts. This facilitates centralized monitoring by enabling a Nagios server to assess the health and status of multiple networked devices through locally-run scripts on each monitored host.

MikroTik Dude Remote Management

Port 2210 is primarily used for remote management of MikroTik RouterOS devices via The Dude, MikroTik’s centralized network monitoring and management tool. It enables administrators to monitor network devices, manage configurations, and perform diagnostics efficiently from a centralized location.

Smartcard TLS

Port 4116 is designated for Smartcard TLS communication, which facilitates secure interactions between smartcard-enabled devices and authentication servers. It supports both TCP and UDP protocols, enabling versatile deployment scenarios for authentication, secure access, and identity verification services.

DNP3

DNP3 (Distributed Network Protocol) is a robust communication protocol widely used in SCADA (Supervisory Control and Data Acquisition) systems to enable reliable data exchange between control equipment such as Remote Terminal Units (RTUs) and Intelligent Electronic Devices (IEDs). Designed for electrical and utility automation sectors, DNP3 ensures efficient and dependable device interoperability across complex supervisory networks.

IBM Sametime & SQL Server

Port 1533 is primarily known for IBM Sametime, which is an enterprise instant messaging and collaboration platform, as well as some communication with Microsoft SQL Server components. It facilitates virtual meetings, rich media chat, and integration with various enterprise tools that support real-time messaging and presence information.

ADAP

The App Discovery and Access Protocol (ADAP) is designed to facilitate dynamic discovery and interaction with applications or services within a networked environment. It allows systems to locate services efficiently and broker communication among distributed components, supporting both TCP and UDP transport to ensure flexibility in deployment. Widely used in networked application ecosystems, ADAP simplifies integration and management by providing a standardized communication protocol for application discovery and access.

IBM AIX NIM

IBM AIX Network Installation Manager (NIM) is a tool that facilitates the deployment, configuration, and management of IBM AIX operating system images across multiple networked systems, greatly simplifying large-scale installations and updates.

Multicast DNS

Multicast DNS (mDNS) is a zero-configuration networking protocol that facilitates hostname resolution without a central DNS server, primarily within small local networks. It allows devices to discover each other and communicate seamlessly, especially helpful in consumer and IoT environments where manual network configuration is impractical.

RadSec

RadSec is a transport layer security (TLS) based protocol designed as a secure implementation of the RADIUS protocol. It protects RADIUS communication channels by encrypting data, ensuring confidentiality and integrity, making it suitable for exchanging authentication, authorization, and accounting information over untrusted networks such as the Internet.

BitTorrent

Port 6888 is commonly associated with the BitTorrent protocol, used for peer-to-peer (P2P) file sharing. This port falls within the traditional range BitTorrent clients use for data transfers, which enables users worldwide to distribute files efficiently without reliance on centralized servers. Its popularity has driven widespread adoption, but it also comes under increased scrutiny due to potential misuse.

NetBIOS Session Service

Port 139 is primarily used by the NetBIOS Session Service, enabling communication between devices on a local network using the NetBIOS protocol. It facilitates file and printer sharing over Windows networks by allowing sessions over TCP/IP. Historically integral to Windows networking, it allows systems to identify each other and establish resource-sharing connections.

Network Time Protocol

The Network Time Protocol (NTP) enables devices across a network to synchronize their system clocks with high precision. By coordinating time settings between clients and servers, NTP is critical for maintaining accurate timestamps in applications, security protocols, and network management tasks. NTP predominantly uses UDP port 123 due to its low-overhead, connectionless nature, supporting efficient communication for time synchronization across global IP networks.

Polycom Broadcast

Port 6771 UDP is typically used by Polycom conferencing systems to facilitate server broadcasts and device auto-discovery within corporate and enterprise networks, enabling seamless deployment and management of voice and video solutions.

CAPWAP Control

CAPWAP (Control And Provisioning of Wireless Access Points) is a protocol standardized in RFC 5415, designed to unify and streamline the management, control, and provisioning of multiple wireless access points (APs) from a centralized wireless controller. Port 5246 specifically handles the control messages exchanged between controllers and APs, allowing centralized management of configurations, firmware updates, and security policies over a secure management channel.

Cisco IP SLA Control

Cisco IOS IP Service Level Agreements (IP SLAs) Control Protocol enables network performance monitoring by defining, configuring, scheduling, and collecting statistics about network operations tests. It allows administrators to measure metrics such as latency, jitter, packet loss, and availability directly through Cisco devices, providing valuable insights into real-time network health and SLA compliance.

Xware xTrm over SSL

Xware xTrm Communication Protocol over SSL is a secure, encrypted communication protocol used primarily within the Xware xTrm platform to enable safe data exchange between enterprise systems, often across corporate firewalls or internet connections. The protocol relies on SSL/TLS to ensure the confidentiality and integrity of transmitted data, supporting encrypted business-critical transfers and integration scenarios.

psyBNC

psyBNC is a popular IRC proxy or Bouncer that allows IRC users to maintain a persistent connection to IRC networks even when they are disconnected. Commonly used by advanced users for privacy, convenience, and hiding IP addresses, it offers multi-server support and filtering capabilities, making it a versatile tool for managing IRC sessions efficiently.

DICOM

DICOM (Digital Imaging and Communications in Medicine) is an international standard for transmitting, storing, retrieving, printing, and displaying medical imaging information. It enables seamless interoperability between medical imaging devices, systems, and healthcare providers around the world, facilitating accurate diagnostics and efficient patient care.

RADIUS Accounting

Port 1646 is primarily used by RADIUS accounting services, often involving Cisco and Juniper Networks devices. It facilitates the transmission of user accounting information, enabling network administrators to track user activity, session statistics, and billing data. This port complements RADIUS authentication (usually on port 1812 or alternatives), ensuring comprehensive management of network access and resource utilization.

Oracle Listener Alt Port

TCP port 1526 is commonly used as an alternative port for Oracle Database Listener services. The Oracle Listener facilitates incoming client connections and routing to the database, playing a fundamental role in Oracle environments. Administrators might configure port 1526 instead of the default 1521 for security or network segmentation reasons.

RTPS DDS Meta-Traffic

RTPS DDS Meta-Traffic is used for the internal communication of Data Distribution Service (DDS) implementations. It handles discovery, metadata exchange, and control traffic necessary for establishing real-time, reliable, and scalable publish-subscribe communications among distributed systems, especially in environments demanding high performance such as robotics or IoT.

Discard Protocol

The Discard Protocol is a simple and obsolete network service that accepts connections and discards any data received without any response. Originally designed for testing, measuring, or debugging, it silently consumes incoming traffic on both TCP and UDP port 9, confirming network reachability without providing feedback. Due to its minimal function and lack of authentication, it's mostly disabled on modern systems for security reasons.

TCPMUX

The TCP Port Service Multiplexer (TCPMUX) is a protocol used on port 1 to allow clients to query a server for a list of active services and connect to specific daemon processes dynamically. It acts as a service directory or initial contact point, facilitating connection establishment to various services hosted on a server.

MikroTik Dude Secure Management

Port 2211 is utilized by MikroTik for secure management communications within The Dude network monitoring system. It facilitates administrative tasks, device management, and secure data transfer between The Dude client and server components, ensuring that network administrators can efficiently monitor and maintain their network infrastructure.

OpenView NNM ovwdb Daemon

Port 2447 is commonly associated with Hewlett-Packard's OpenView Network Node Manager (NNM), a widely used solution for network monitoring, fault detection, and management. Specifically, this port is used by 'ovwdb,' the OpenView object database daemon, facilitating inter-component communication and database access within NNM's distributed architecture. It typically listens over both TCP and UDP, enabling efficient data handling between consoles and agents on large enterprise networks.

Miralix Proxy

Miralix Proxy is primarily used by Miralix solutions to facilitate call center communication management and proxying of signaling data between various telephony components. It acts as a middleware component, ensuring seamless integration and data exchange in complex telecom environments.

XMPP Server Connection

Port 5269 is primarily used for server-to-server communication in the Extensible Messaging and Presence Protocol (XMPP), which facilitates real-time messaging, presence notifications, and contact list maintenance across federated servers. This port enables different XMPP servers across the Internet to interconnect, allowing users on different domains to chat seamlessly.

NetBIOS Name Service

NetBIOS Name Service (NBNS) is an essential part of the NetBIOS protocol suite, primarily used for local network name resolution and registration in Windows-based environments. It enables networked devices to register their NetBIOS names and resolve others, facilitating communication across devices without relying on DNS.

UPnP Device Interop

Port 5000 is widely used for Universal Plug and Play (UPnP) services, particularly on Windows networks to facilitate device discovery, configuration, and interoperability. By enabling seamless integration of networked devices such as printers, media servers, and IoT devices, UPnP over TCP on port 5000 greatly enhances user convenience, though it also introduces specific security considerations.

NetGuard GuardianPro Remote Management

Port 1500 is typically used for remote management of NetGuard GuardianPro firewalls based on NT4 systems. This port facilitates administrative access, configuration management, and real-time monitoring of firewall status. Designed for legacy environments, it enables system administrators to remotely maintain security policies and respond to network events efficiently.

America's Army MMO

Port 1716 is primarily associated with America's Army, a massively multiplayer online game developed by the U.S. Army to provide a virtual military simulation experience. It facilitates game data transmission, synchronization, and player communications during online gameplay sessions. Use of this port is generally essential for smooth interaction between game servers and clients.

Private Printer Server

Port 35 is unofficially associated with proprietary or private printer server protocols, typically for device discovery, configuration, and data exchange in local or enterprise printer networks. It can support both TCP and UDP transport modes, providing flexibility during printer communication setup and operation.

OCFS2

Oracle Cluster File System 2 (OCFS2) is a shared-disk cluster file system designed to facilitate data sharing in clustered Oracle environments. It allows multiple servers to concurrently access a single storage volume, supporting high availability and scalability for databases, middleware, and other applications requiring shared storage. Installed primarily on Linux systems, OCFS2 is widely used in enterprise deployments to simplify complex clustering tasks.

AcceleNet ITP

AcceleNet Intelligent Transfer Protocol (ITP) accelerates data transmission across WANs by optimizing network traffic. It is used primarily by Circadence Corporation's WAN optimization products to enhance application performance, reduce latency, and improve bandwidth utilization in enterprise networks.

TcpWrapped (MacBook)

TcpWrapped (MacBook) is a firewall feature designed for Linux Operating Systems, ensuring controlled access to ports.

Lot105 DSuper Updates

Port 2053 is utilized primarily for Lot105 DSuper Updates over UDP. It serves specific update and communication functions tied to proprietary or specialized devices or services, facilitating the delivery and synchronization of software patches and system data without relying on TCP.

Live Messenger Whiteboard Sharing

Port 1503 is historically associated with Windows Live Messenger's whiteboard and application sharing features. Utilizing the T.120 protocol, it facilitated real-time collaboration, desktop sharing, and whiteboard sessions during instant messaging conversations, enabling users to work interactively across different network types.

AMX ICSP

AMX Integrated Control System Protocol (ICSP) is used primarily for communication among AMX automation and control devices used in sophisticated AV and building control solutions. It enables seamless command transmission and device management within custom automation networks.

IPStor Management

- The IPStor Server management port facilitates configuration and control of IPStor storage servers. - It utilizes secure communication channels, typically HTTPS, to allow administrators to manage storage resources effectively. - This port ensures centralized management across distributed storage systems within an organization.

Lotus Notes RPC

Port 1352 is primarily used for IBM Lotus Notes and Domino servers to communicate using a proprietary Remote Procedure Call (RPC) protocol. This protocol facilitates messaging, database, and directory services within the IBM collaboration suite, ensuring clients and servers exchange commands and data efficiently across networks.

NetBIOS Datagram Service

NetBIOS Datagram Service (port 138) facilitates connectionless communication primarily for NetBIOS over TCP/IP networks. It is used extensively in Windows network environments for tasks such as name service browsing and datagram distribution, aiding functions like resource sharing and messaging within local networks.

Border Gateway Multicast Protocol

Border Gateway Multicast Protocol (BGMP) is designed to facilitate scalable multicast routing across multiple autonomous systems in the internet infrastructure. It helps exchange multicast routing information between border routers, enabling efficient delivery of multicast data streams such as audio, video, and other group-based communication across complex networks and domains.

FTP Data Transfer

Port 20 is primarily used as the data channel within the File Transfer Protocol (FTP), responsible for the actual transfer of files between client and server. Typically used alongside port 21, which handles control commands, this port facilitates unencrypted file transfers across networks, making it a fundamental component in traditional file sharing and server communication.

Identification Protocol

Port 113 was historically used for the Identification Protocol (Ident), a service that identifies the user of a particular TCP connection. This service allowed remote servers to query a client system to determine which user initiated a connection request, facilitating logging and access controls. While once commonly enabled on servers and network devices, Ident's use has declined substantially due to privacy concerns, inherent security risks, and the development of more secure authentication methods.

ISO-TSAP Class 0

ISO Transport Service Access Point (TSAP) on TCP port 102 is primarily used in OSI protocols, notably for communication between industrial control systems and automation devices such as PLCs and SCADA systems. It facilitates the transport layer's connection-oriented communication, serving as a gateway to multiple higher-level protocols and services conforming to ISO standards.

NetGuard GuardianPro Auth Client

The NetGuard GuardianPro firewall Authentication Client enables secure communication and verification processes between client systems and the GuardianPro firewall on NT4 platforms. Operating mainly over UDP port 1501, it facilitates authentication requests and responses, helping enforce network access control. This service is essential for validating clients before granting protected network access via the GuardianPro security suite.

DNP3 Secure

DNP3 Secure is an enhanced, secure version of the Distributed Network Protocol used primarily for communication between SCADA systems and devices like RTUs and IEDs. It adds robust authentication and encryption features to the standard DNP3, aiming to protect critical infrastructure communications from interception and tampering.

RADIUS Auth Protocol

The RADIUS (Remote Authentication Dial-In User Service) protocol is a security protocol primarily used to provide centralized Authentication and Authorization services for users attempting to access a network. It facilitates the validation of user credentials and determines user permissions before granting access. Widely adopted by ISPs and enterprise WLANs, RADIUS enables scalable and secure user management across various network access servers.

AVM CAPI-over-TCP

AVM CAPI-over-TCP enables ISDN signaling data to be transmitted over Ethernet networks, effectively encapsulating ISDN protocols within TCP/IP for remote access or integration. This facilitates the bridging of traditional ISDN communication with modern IP infrastructure, often serving AVM's Fritz!Box devices and similar hardware.

Distributed Interactive Simulation

Distributed Interactive Simulation (DIS) is a standardized protocol primarily used for enabling real-time platform-level wargaming across multiple locations. It facilitates interaction and communication between simulators by exchanging data such as entity states and environmental effects, thus allowing complex, interoperable simulation environments. Port 3000 serves as a commonly modifiable default UDP port used in DIS deployments.

WAP Push MMS

Port 2948 handles WAP Push Multimedia Messaging Service (MMS) communications over both TCP and UDP. It is primarily associated with delivering multimedia content to mobile devices in cellular networks. This port facilitates the transmission of rich MMS messages — including images, videos, and audio — by leveraging Wireless Application Protocol (WAP) push mechanisms.

Private Mail

Port 24 is traditionally assigned for private mail systems, serving as a dedicated communication channel distinct from standard email protocols. This port is seldom used in modern network infrastructures but may still be encountered in legacy or proprietary messaging environments. Its primary function involves facilitating the transfer and exchange of email-like messages within closed or controlled networks.

SQL Services

Port 118 is associated with various SQL (Structured Query Language) services, which provide functionalities related to database management and data querying in client-server architectures. It facilitates communication between applications and database servers to execute queries, manage data storage, and perform database operations.

XMPP Client Connection

XMPP, or Extensible Messaging and Presence Protocol, is a widely-used open protocol supporting real-time messaging, presence information, and communication between clients and servers. Port 5222 is the default TCP port for client-to-server communications as defined in RFC 3920, facilitating instant messaging, presence updates, and basic signaling for chat services. This protocol underpins many well-known chat platforms and federated messaging systems.

CyBro A-bus

CyBro A-bus is an industrial automation communication protocol developed by Cybrotech Ltd., typically used for managing programmable logic controllers (PLCs) and automation systems. By operating on port 8442, it facilitates supervisory control and integration of field devices in industrial environments. This port supports both TCP and UDP for flexible communication in industrial networks.

XBT BitTorrent Tracker

XBT BitTorrent Tracker is a high-performance BitTorrent tracker software used to coordinate the transfer of torrent files across peers. It leverages efficient resource management to handle a large volume of connections and is popular among private BitTorrent communities and sites for its speed and scalability.

NetWare Core Protocol (NCP)

NetWare Core Protocol (NCP) facilitates communication with Novell NetWare servers, handling essential network tasks such as file and print sharing, directory services, and time synchronization. Commonly deployed on legacy enterprise networks, it enabled efficient access to server resources and centralized management, remaining prevalent in environments still utilizing NetWare infrastructure.

WebHost Manager

Port 2086 is the default port used for accessing WebHost Manager (WHM), a powerful administrative control panel built by cPanel. WHM enables server administrators and resellers to manage hosting accounts, configure servers, handle security, and perform numerous server management operations effortlessly. By default, it operates over an unencrypted HTTP connection, though it has a secure counterpart on a different port.

PDTP

PDTP (Peer-to-Peer Distribution Transfer Protocol) is a communication protocol designed for file sharing within peer-to-peer (P2P) networks. Functioning similarly to FTP, it facilitates efficient data transfers between distributed nodes without reliance on central servers, enhancing scalability and redundancy.

Remote Server System

Port 384 is designated for a Remote Network Server System protocol that supports communication between remote clients and network-based servers. This port facilitates remote configuration, monitoring, and management tasks, often enabling system administrators to perform crucial operations without direct physical access. It is an official port assignment that is known for its versatility in enabling remote network services across various environments.

Miralix IVR & Voicemail

Port 3017 is primarily associated with Miralix Interactive Voice Response (IVR) and Voicemail services, facilitating voice message handling, automated call routing, and integration with telephony systems to enhance communication workflows within organizations.

Lantronix Discovery

Lantronix Discovery is a protocol used for locating and managing Lantronix serial-to-Ethernet devices within a local network. It enables administrators to quickly identify connected devices, configure their network settings, and perform basic management tasks. This port primarily functions over UDP, facilitating device detection and initial setup.

SIP

Session Initiation Protocol (SIP) is a widely used signaling protocol that enables the initiation, management, and termination of real-time communication sessions such as voice, video, and messaging over IP networks. It plays a critical role in the operation of Voice over IP (VoIP) services, allowing different devices and applications to establish connections seamlessly.

NOAAPORT Broadcast

The NOAAport Broadcast Network delivers real-time weather, hydrological, and climate data from the National Oceanic and Atmospheric Administration (NOAA) to various users, including emergency services and broadcasters. This service relies on satellite multicast to disseminate timely alerts, forecasts, and critical updates, aiding in rapid decision-making and public safety operations.

XBT UDP Tracker Extension

Port 2710 is primarily associated with the experimental UDP extension of XBT BitTorrent Tracker, facilitating efficient peer discovery and communication within BitTorrent networks. Using this UDP-based implementation aims to minimize bandwidth and processing overhead compared to traditional HTTP-based trackers, contributing to improved scalability and responsiveness for large-scale file sharing ecosystems.

MSDP

The Multicast Source Discovery Protocol (MSDP) is used in inter-domain multicast routing to facilitate the sharing of multicast source information between different multicast-enabled routing domains. It enables routers to discover active multicast sources outside their own domain, enhancing the distribution of multicast streams across the internet.

TACACS

TACACS (Terminal Access Controller Access-Control System) is an authentication, authorization, and accounting protocol widely used in network environments to manage access control for routers, switches, and other network devices. Operating on both TCP and UDP port 49, TACACS helps network administrators enforce centralized security policies easily, offering flexibility and granular access management for network users and administrators alike.

OpenVPN

OpenVPN is an open-source VPN protocol and software that enables secure, encrypted connections over both TCP and UDP. Designed for flexibility, reliability, and ease of configuration, OpenVPN has become one of the most popular solutions for creating virtual private networks that bypass network restrictions and ensure data privacy.

BitTorrent

Port 6889 is widely known as a default communication port leveraged by BitTorrent peer-to-peer (P2P) file sharing protocols. It facilitates decentralized file distribution by enabling peers to connect, share, and transfer segments of files directly without a centralized server, optimizing bandwidth usage and redundancy.

MUSE

MUSE typically refers to a network port used by peer-to-peer applications, online gaming clients, or proprietary server protocols. Port 6888 is part of a range often associated with distributed file sharing, but it can also serve various other services depending on the specific application configuration. Its flexibility makes it a target for custom implementations requiring accessible high ports.

SQL Service

Port 156 is officially assigned for SQL Services Provided over either TCP or UDP. It typically facilitates communications in distributed database management systems, allowing database access, synchronization, and replication between servers or clients over a network environment. While not as universally standard as other database ports (like 1433 for Microsoft SQL Server), port 156 can be employed in specific legacy or specialized IBM database environments.

HP Data Alarm Manager

HP Data Alarm Manager primarily uses port 383 for managing data alarms, typically within Hewlett-Packard network device environments. It helps administrators monitor and respond to threshold breaches or fault conditions by communicating alarm data between network management tools and HP hardware.

Border Gateway Protocol

BGP (Border Gateway Protocol) is a standardized exterior gateway protocol designed to exchange routing information between autonomous systems (ASes) on the Internet. It forms the backbone of routing decisions across the global Internet, helping network operators determine the most efficient paths for data. Due to its importance, BGP plays a crucial role in maintaining overall Internet connectivity and stability.

Raven Trinity Broker

**Raven Trinity Broker Service** on port **2713** provides specialized functions in managing connections within distributed computing or enterprise environments. It facilitates communication and resource brokering among clients and servers, enabling efficient service discovery, session management, and data transmission. Both **TCP** and **UDP** protocols are supported, allowing flexible, multi-protocol connectivity options across diverse network setups.

iSCSI Target Service

Port 3260 is the default TCP port used by the iSCSI (Internet Small Computer System Interface) protocol's target service. It facilitates the communication between an iSCSI initiator (client) and target (server), enabling block-level storage data access over IP networks. Commonly employed in storage area networks (SANs), it helps organizations consolidate and manage storage devices efficiently.

DHCP Failover

Port 647 is officially designated for the DHCP Failover protocol, which enables communication between primary and secondary DHCP servers to maintain IP address allocation consistency and high availability. By synchronizing lease information, this protocol plays a crucial role in ensuring continuous network connectivity and minimizing IP conflicts during server outages.

RPC2 Port Mapper

Port 369 is officially assigned to the RPC2 Port Mapper service, which functions similarly to the classic portmapper for Remote Procedure Call-based services. This port enables clients to locate other RPC2 services dynamically by providing the necessary mapping information. Its operation is vital in distributed environments relying on RPC2 to facilitate seamless communication between distributed components.

EasyBits School Discovery

EasyBits School uses port 1110 for its network discovery protocol, primarily designed for Intel’s Classmate PC (CMPC) platform in educational settings. This protocol helps devices identify peers and servers within a school LAN, facilitating easy communication and management within classrooms equipped with Intel CMPC devices.

FlexNet License Server

Port 27000 is commonly associated with FlexNet Publisher, a software license management system used for controlling software usage across networks. It is part of a flexible port range (default usually 27000-27009) dedicated to managing license requests and coordination between client applications and license servers. This port facilitates communication that checks license availability, manages license check-in/check-out, and enforces licensing policies within organizational software deployments.

Zephyr Hostmanager

Port 2104 is primarily used by the Zephyr Notification Service component, Hostmanager, within MIT's Project Athena environment. It facilitates the delivery of real-time notifications and messaging services among users and systems, supporting both TCP and UDP protocols. Despite being a legacy system, Zephyr remains a key technology within educational campuses and research environments to provide alerts and collaboration notifications.

JtoMB Protocol

JtoMB is an unofficial, lesser-known protocol operating over TCP port 1001, occasionally used in embedded systems, IoT devices, or proprietary middleware solutions. Its primary purpose often revolves around message brokering or device communication in specialized environments rather than widespread internet services.

Microsoft DCOM

TCP port 1026 is frequently associated with Microsoft Distributed Component Object Model (DCOM) services. DCOM enables software components to communicate over a network, facilitating distributed computing on Windows environments. This port is notorious for being targeted by malware and pop-up spam, especially when RPC services listen on this port.

BitTorrent

BitTorrent is a widely used peer-to-peer (P2P) protocol that facilitates the distribution of large files by breaking them into smaller pieces and sharing them across multiple users. Port 6881 is commonly utilized by BitTorrent clients during initial peer discovery and data transfer phases, making it a prime port within the BitTorrent communication range. This decentralized approach increases speed and resilience in file sharing but also poses distinct security challenges given its openness and popularity.

QualiSystems TestShell

QualiSystems TestShell Suite is a comprehensive automation platform designed to accelerate and streamline network, cloud, and virtualization testing processes. It provides a modular framework enabling users to design, execute, and analyze test configurations in complex lab environments efficiently.

Remote Login (rlogin)

**rlogin** (Remote Login) provides remote command-line access to Unix systems, allowing users to log in over the network as if they were directly connected.

Management Utility

Port 2 is historically designated for management utilities within networked systems. Although rarely used in modern applications, it can be reserved by legacy services or specialized device management interfaces. Proper awareness of this port is important to avoid misuse or accidental exposure in secure environments.

LLMNR

Link-Local Multicast Name Resolution (LLMNR) is a protocol that enables devices on the same local network segment to perform name resolution without requiring a DNS server. Primarily found in Microsoft environments starting from Windows Vista and Server 2008, LLMNR facilitates communication during network initialization or when DNS is unavailable.

SNMP

Simple Network Management Protocol (SNMP) is a widely used protocol for network management. It facilitates the monitoring and management of network devices, including routers, switches, servers, printers, and other connected hardware. SNMP enables centralized network control by allowing administrators to collect information, configure devices, and detect network issues efficiently.

Miralix GreenBox API

Miralix GreenBox API is a communication interface designed to integrate Miralix’s telephony and contact center solutions with external systems and business tools. It streamlines the process of connecting call control, presence information, and other unified communications features, enabling organizations to optimize customer interactions and internal communications through a centralized API platform.

MIL-STD-2045-47001 VMF

MIL-STD-2045-47001 VMF (Variable Message Format) is a military data communication protocol used primarily for tactical messaging among defense systems. Leveraging efficient message formatting, it facilitates rapid, secure, and interoperable data exchange across diverse battlefield communication platforms.

Kerberos Password Change

Port 464 is primarily used for the Kerberos protocol's password change and set functions, enabling secure management of user credentials within a Kerberos authentication infrastructure.

Resource Location Protocol

Resource Location Protocol (RLP) enables networked devices to identify and locate resources unambiguously within a distributed computing environment. It facilitates efficient querying and retrieval of network resource information, making it easier for systems to manage connections and communicate with each other dynamically.

4D Database Communication

Port 19813 is primarily utilized for communication between 4D database servers and their clients. It enables the exchange of data, execution of queries, and synchronization of application logic in environments where 4D is deployed for rapid database development and management.

CUCM Intercluster

Port 8002 is used by Cisco Unified Communications Manager (CUCM) for intercluster communication, facilitating seamless voice and call control information exchange between different CUCM clusters deployed within an organization.

VPOP3 Status

VPOP3 Mail Server is a Windows-based POP3/SMTP email server that provides businesses with internal and external email handling capabilities. Port 5109 is used for status and management communication between client tools, monitoring systems, and the server itself. It facilitates administrative tasks such as checking the health of the mail server, reviewing messages in queue, and managing configuration remotely.

Systat

Systat is a legacy network service running on port 11, historically used to provide information about active users logged into a system. Initially part of the suite of early Internet services, it queried the system's status and relayed basic data about logged-in accounts. Today, it is primarily obsolete and carries significant security risks.

IRC

Internet Relay Chat (IRC) is a pioneering real-time text messaging protocol designed for group and private communication across the internet. Primarily used for group chat rooms, private messaging, and file sharing, IRC has shaped the foundation of online communication platforms since its inception in the late 1980s.

SMTP

SMTP (Simple Mail Transfer Protocol) is one of the core protocols used for sending emails across the Internet. It facilitates the reliable transfer of outgoing mail between email servers and from email clients to servers, enabling seamless global communication. Operating primarily over TCP port 25, SMTP ensures that messages are relayed efficiently, serving as the foundation of modern Internet email infrastructure.

BitTorrent

Port 6970 is commonly used by BitTorrent, a popular decentralized peer-to-peer (P2P) protocol for distributing files over the internet. This port is part of the usual dynamic range leveraged by BitTorrent clients to establish multiple data transfer connections across a distributed mesh network. Port 6970 is unofficial but widely utilized due to its flexibility within the P2P network environment, facilitating high-volume file sharing activities.

IEC 60870-5-104

IEC 60870-5-104 is a protocol standard widely used for telecontrol in electric power systems, enabling data exchange for supervisory control and data acquisition (SCADA). Operating over TCP/IP networks, it facilitates real-time monitoring and remote management of electrical grids, substations, and automation devices to ensure reliable power delivery.

Gobby Collaboration

Gobby is a real-time collaborative text editor that allows multiple users to simultaneously edit documents over a network. Built upon the libobby library, it enables seamless editing with immediate updates, supporting group projects, code collaboration, and shared note-taking across platforms. Gobby's focus on simplicity and efficiency makes it a popular tool for developers, teams, and educational settings.

Kaspersky AV Control Center

Port 8087 is used by the Kaspersky Anti-Virus Control Center for managing antivirus deployments over a network. It facilitates server-client communication for centralized control, updates, and monitoring of antivirus agents installed across the infrastructure.

SGMP

_Simple Gateway Monitoring Protocol (SGMP) is an early network protocol designed to manage and monitor network gateways. It was a precursor to SNMP and enabled administrators to gather gateway status and control traffic-related parameters, providing basic insights into network health and performance._

Microsoft DCOM

Port 1029 is frequently associated with Microsoft Distributed Component Object Model (DCOM) communications. DCOM enables software components to communicate directly across networked environments, predominantly within Windows operating systems. While this port is unofficial and dynamic, it's commonly observed during remote procedure calls and system management activities.

Leonardo over IP

Leonardo over IP by Pro2col Ltd is a network service designed primarily for efficient data transfer and management of document workflows. It often facilitates collaboration by enabling secure and controlled file sharing within enterprise networks, leveraging IP protocols to transmit data seamlessly across locations.

SMTP over SSL

Port 465 is commonly used for secure SMTP communication, encapsulating email transmission within SSL encryption. This port facilitates encrypted email delivery between clients and mail servers, enhancing privacy compared to traditional plain-text SMTP connections. Although it was initially designated as a secure SMTP port, its status has shifted over time, but it remains widely supported for legacy encrypted email connections.

DTSPCD

DTSPCD (Distributed Terminal Server Process Controller Daemon) is a network service primarily used to remotely execute commands and launch applications on UNIX systems, notably those running CDE (Common Desktop Environment). It facilitates client-server interactions for remote desktop management, enabling administrative tasks and remote application control over a network. While originally designed to enhance remote system management capabilities, it has since fallen out of favor due to significant security vulnerabilities.

Gobby Collaborative Editing

Port 6523 is primarily used by Gobby 0.5 and other libinfinity-based collaborative editing applications. These tools enable multiple users to edit documents simultaneously in real-time, fostering efficient teamwork and communication. The collaboration relies on a server-client architecture where a session host manages document access and synchronization across clients.

Rexec

Rexec (Remote Execution Daemon) is a service traditionally used on UNIX systems allowing users to execute commands on a remote machine over a network. It facilitates remote process execution by authenticating with a username and password sent in plain text, which poses significant security risks. While once commonly adopted in trusted internal environments for remote management, Rexec has largely been superseded by more secure technologies due to its inherent vulnerabilities.

EForward Document Transport

EForward is a document transport system used to facilitate the exchange of documents between distributed systems, often within enterprise environments. It enables clients and servers to send, receive, and route documents efficiently by leveraging standardized communication protocols. Operating over both TCP and UDP, it provides flexibility in transporting structured business data or internal messaging streams. Its primary focus lies in reliable document delivery and streamlined system integration.

GNUnet

GNUnet is a secure, decentralized peer-to-peer networking framework designed to enable privacy-preserving communication, file sharing, and distributed applications. It prioritizes anonymity and resistance to censorship, making it a robust platform for privacy advocates and researchers interested in decentralized Internet technologies.

RAP - Internet Route Access Protocol

<p>RAP, Internet Route Access Protocol</p>

Symantec pcAnywhere

Symantec pcAnywhere is a remote access tool that enables secure communications and control over another system, often used for remote support or administration. The port 5631 is utilized specifically for data transfer in versions 7.52 and later. Despite its usefulness, it has a history of security concerns and is largely considered legacy software today due to emerging, more secure remote access solutions.

Miralix OM

Port 3007 is primarily utilized by the Miralix OM Server, a platform designed to facilitate omni-channel communication management, typically in contact center environments. The server provides integration points for telephony, messaging, and management systems, enabling seamless workflow and communication routing within enterprise setups.

World of Warcraft

Port 3724 is primarily used by World of Warcraft, a popular massively multiplayer online role-playing game (MMORPG) developed by Blizzard Entertainment. It facilitates client-server communications essential for gameplay, including authentication, world updates, and player actions. As an unofficial yet standard port for this game, it supports both TCP and UDP protocols to ensure responsive, immersive online gaming experiences.

Quake III Arena & ioquake3 Games

Ports 27960 through 27969 are commonly used by Activision's Enemy Territory, id Software's Quake III Arena, Quake Live, and various ioquake3-derived games for multiplayer communications. These ports primarily facilitate real-time data exchange between game servers and clients over UDP, enabling fast-paced, low-latency gameplay critical for first-person shooter experiences.

Media Management Protocol

Media Management Protocol (MMP) on port 654 facilitates the management, control, and distribution of media content across networked environments. It enables communication between media servers and clients, supporting a range of commands and functions to organize, retrieve, and deliver audio, video, and related content efficiently within media management systems.

Altiris Deployment Client

Altiris Deployment Client port 402 facilitates communication for Symantec's Altiris Deployment Solution, a remote management suite for device deployment, imaging, and maintenance within enterprise environments. It supports client-server interactions to streamline the automation of provisioning, software distribution, and system updates, enabling efficient management of large-scale IT infrastructures.

BitTorrent

Port 6901 is commonly associated with BitTorrent peer-to-peer (P2P) file sharing traffic. It typically falls within the dynamic range of ports used by BitTorrent clients during data exchange, enabling users to download and upload large files efficiently across distributed networks. As an unofficial port, it’s utilized variably by different clients when establishing multiple connections for torrent swarms.

BitTorrent

BitTorrent is a peer-to-peer (P2P) file sharing protocol widely used for distributing large amounts of data efficiently over the Internet. It enables users to download files from multiple sources simultaneously, enhancing speed and reliability compared to traditional client-server transfers. BitTorrent is frequently used for sharing open-source software, media, and large datasets.

Network Caller ID

Port 3333 is commonly used for the Network Caller ID (NCID) server service, an open-source system designed to distribute caller identification info across a network. It enables sharing caller ID information from a telephony input (like a modem or VoIP gateway) to various connected devices, such as PCs or media centers, enhancing call screening and logging across networked systems.

SoftPerfect Bandwidth Manager

SoftPerfect Bandwidth Manager is a network traffic management tool that helps administrators monitor and control bandwidth consumption across diverse network environments. It applies rules and policies to manage data flow, optimize resource distribution, and prevent bandwidth overuse, ensuring optimal network performance and fairness among users.

WatchGuard Auth Applet

Port 4100 is typically associated with the WatchGuard Authentication Applet, which facilitates user authentication processes within WatchGuard network security devices. This service enables clients to communicate authentication credentials to a WatchGuard firewall or security appliance, granting trusted network access based on identity verification.

new-rwho / new-who

The 'new-rwho' and 'new-who' services traditionally operate over UDP port 550, providing user information within networked UNIX systems. These protocols enable administrators to monitor logged-in users across multiple hosts, facilitating easier system management and visibility. While their use has diminished in modern secure environments, understanding these legacy protocols remains important for maintaining backward compatibility and auditing historical systems.

Miralix CSTA

Miralix CSTA is a port used primarily by Miralix solutions implementing the Computer Supported Telecommunications Application (CSTA) standard, which enables computer-telephony integration. It facilitates call control and telephony event monitoring between telephony hardware and software applications, commonly within call centers or unified communication environments.

WINS

Microsoft Windows Internet Name Service (WINS) is a legacy name resolution service designed to map NetBIOS names to IP addresses within Windows-based networks. This enables devices running Windows to locate and communicate with each other using familiar computer names rather than numerical IP addresses, which is essential for older Windows networking protocols and compatibility with legacy systems.

APC Agent

APC Agent is a proprietary management service used primarily with APC (American Power Conversion) network devices such as UPS systems. It enables remote management, monitoring, and control of power events and environmental data, facilitating automation and resilience of critical infrastructure.

SecureCast

SecureCast is a protocol primarily used for outbound communication with Network Associates Inc. (NAI) servers. It facilitates the secure management, monitoring, and transfer of systems or security-related data, serving enterprise network infrastructure and security services. This port is often used by administration tools or security applications to transmit information externally.

X-BEAT Status Check

Port 18605 is commonly utilized by the X-BEAT system to perform status and version checks on remote agents or devices. It supports both TCP and UDP protocols, allowing flexible communication modes for network administration and diagnostic tasks.

Internet Printing Protocol

The Internet Printing Protocol (IPP) is a network protocol used for distributed printing over IP networks. It allows clients to submit print jobs to networked printers, query printer capabilities, manage print jobs, and receive status updates, making it a widely adopted standard for modern network printing solutions.

IBM RMC

IBM RMC (Remote Monitoring and Control) is a proprietary IBM protocol primarily used within IBM Power Systems environments. It enables the communication between the Hardware Management Console (HMC), Integrated Virtualization Manager (IVM), and logical partitions (LPARs), facilitating dynamic partition management and monitoring. This protocol is vital for resource allocation, hardware status updates, and remote configuration within enterprise IBM systems, supporting efficient virtualization and system management.

ACAP

**ACAP (Application Configuration Access Protocol)** is a protocol designed primarily for the storage, retrieval, and management of user configuration data and preferences across multiple devices or applications. It facilitates centralized access to user-related data such as bookmarks, contact lists, and email preferences, making user profiles portable and synchronized across distributed clients.

Kerberos

Kerberos is a widely-used network authentication protocol designed to provide strong authentication for client/server applications through secret-key cryptography. Port 88 supports the Kerberos authentication system for securely verifying the identities of users and services across insecure networks. Both TCP and UDP transport mechanisms are employed depending on the use case, ensuring flexibility and reliability in various environments.

CA DMP / Port Multiplexer

Port 4728 is commonly associated with Computer Associates (CA) Desktop and Server Management (DMP) systems, functioning as a port multiplexer to facilitate communication between various management services. It enables centralized management of desktop and server resources, streamlining IT administration and improving operational efficiency. Due to its role, it often operates in enterprise environments to manage software distribution, monitoring, and remote control functionalities.

KnowShowGo P2P

KnowShowGo P2P is a communication protocol that facilitates peer-to-peer connectivity, primarily associated with the KnowShowGo software. This port enables users to establish direct connections, often for sharing files, streaming content, or collaborative activities within decentralized network architectures.

Norman Scanning Service

Norman Distributed Scanning Service is used by Norman security products for distributed malware scanning and coordination across networked endpoints. It facilitates efficient scanning by offloading tasks, distributing updates, and managing scan schedules in enterprise environments.

GoToMyPC

GoToMyPC is a remote desktop service that provides users with the ability to access and control their computers from any internet-connected device. Utilizing a client-server model, it facilitates secure, convenient, and on-demand remote access suited for business and personal use. The service often uses port 8200 for client communications with GoToMyPC servers.

Simple Network Paging Protocol

The Simple Network Paging Protocol (SNPP) is an Internet protocol specified in RFC 1568 used to send alphanumeric messages to pagers through TCP/IP networks. It allows clients and applications to communicate efficiently with paging service providers' systems over the Internet by implementing a simple command set similar to other messaging protocols.

MooseFS Chunk Servers

Port 9422 is used by MooseFS, an open-source distributed file system designed to provide fault tolerance, high availability, and scalability. This port specifically facilitates communication between chunk servers and clients, enabling clients to directly access or store data blocks across the distributed storage network.

Route Access Protocol

Route Access Protocol (RAP) is an early protocol primarily used for routing table maintenance and exchange within network infrastructures. It facilitates the distribution of routing information between routers, enabling dynamic network topology updates and helping routers adjust their forwarding decisions based on the latest route data.

BitTorrent Data Transfer

Port 6891 is commonly used by BitTorrent clients as part of a range of dynamic ports essential for peer-to-peer file transfer. It facilitates the exchange of data chunks between peers, enabling efficient decentralized distribution of large files. Since BitTorrent dynamically selects ports within a broad range, 6891 is one that often appears during torrenting activity.

Nessus Scanner

Port 1241 is primarily used by Nessus, a popular vulnerability assessment tool designed to identify and remediate security issues across networked environments. Both TCP and UDP are supported, facilitating flexible communication during scans, plugin updates, and report retrieval. While essential for penetration testing and security auditing, exposure of this port in production environments requires careful control due to its sensitive nature.

SMTP Submission

Port 587 is primarily used for the submission of email messages over the Simple Mail Transfer Protocol (SMTP). It is designated for client-to-mail server communication, allowing authenticated users to send outgoing emails securely, typically requiring authentication and optional encryption. This port replaces legacy port 25 for authenticated message submission to improve security and adherence to email standards.

VTun VPN

VTun is a virtual tunneling software that creates encrypted and unencrypted VPN tunnels between remote systems, facilitating secure communication. It is primarily used to build secure private networks over the internet, leveraging techniques like tunneling and optional encryption to provide confidentiality, authentication, and data integrity. Though flexible and configurable, its default operation on port 5000 supports various link options including Ethernet and IP-level virtual links.

Remote Job Entry

Remote Job Entry (RJE) is an early protocol designed for submitting batch processing jobs from remote locations to mainframe computers. It facilitated offsite users or departments in efficiently sending jobs and retrieving results without direct access to the data center. RJE was primarily used in large enterprise and academic environments before the advent of modern distributed and interactive systems.

BitTorrent

Port 6902 is commonly associated with the BitTorrent peer-to-peer (P2P) file-sharing protocol. It is part of a wide, dynamic range of ports leveraged by BitTorrent clients to establish decentralized connections with peers during file distribution. Its usage facilitates highly efficient data transfers without dependence on central servers, thus reducing bottlenecks and supporting scalable distribution.

KeyShadow K2

KeyShadow for K2, including KeyAuditor and KeyServer by Sassafras Software, is an asset management solution that facilitates comprehensive software license control and monitoring over networks. It allows organizations to effectively track, audit, and enforce their software usage policies, reducing compliance risk and optimizing license utilization. Communication on this port typically handles the exchange of license validation queries and asset management data.

SoftPerfect Bandwidth Manager

SoftPerfect Bandwidth Manager is a traffic management and bandwidth monitoring application that primarily uses UDP port 8702 for communication between its management console and distributed agents. It allows network administrators to control usage, prioritize traffic, and enforce data quotas across a network in real-time.

Exchange Routing

Port 691 is used by Microsoft Exchange Server for routing email messages within and between Exchange servers in an organization. It plays a vital role in facilitating message transport and ensuring efficient communication across the messaging infrastructure.

ThoughtSignal Communication

ThoughtSignal Server Communication Service typically serves internal signaling or telemetry purposes within ThoughtSignal infrastructure or applications. It often operates in an informational or monitoring capacity, rather than facilitating primary user-facing services, and is generally associated with unofficial, application-specific messaging.

Zabbix Trapper

Port 10051 is primarily used by Zabbix, an open-source monitoring solution, to facilitate communication between the server and its agents or clients. The port functions as a 'trapper' endpoint, receiving passive monitoring data, allowing the server to collect metrics, trigger alerts, and maintain health insights without requiring continuous polling.

DHCP Failover

The DHCP Failover protocol is used to synchronize IP address leasing information between two DHCP servers, providing high availability and load sharing in enterprise networks. It allows DHCP services to remain operational even if one server fails, enabling continuous network connectivity for clients.

Softros LAN Messenger

Softros LAN Messenger is a secure instant messaging solution designed for internal communication within corporate local area networks. It allows team members to communicate efficiently without reliance on external servers or internet connections, providing a straightforward messaging interface suitable for workplace use.

XNS Clearinghouse

Xerox Network Systems (XNS) Clearinghouse provides a directory service within the XNS suite, facilitating network resource resolution and management. Operating on port 54, it plays a fundamental role in distributed computing environments where address and resource lookups are crucial. While now largely obsolete, understanding its function remains important for legacy system maintenance and network forensics.

CHARGEN

The Character Generator Protocol (CHARGEN) is a simple network service designed primarily for testing, debugging, and measurement of network performance. When connected, a server running the CHARGEN protocol continuously generates a stream of arbitrary characters until the client closes the connection. Initially developed for diagnostic purposes, this protocol is rarely used in modern systems but still exists on many legacy devices and installations.

Galaxy Network Service

**Galaxy Network Service (GNS)** is designed to facilitate communication and data exchange for Gateway Ticketing Systems, widely used in ticketing and access control across entertainment venues, museums, and attractions. It helps back-end ticketing servers, point-of-sale devices, web portals, and entry control systems stay connected and synchronized, supporting high-volume transactions and seamless visitor management.

SNMP Trap

SNMP Trap is a notification mechanism within the Simple Network Management Protocol (SNMP). It allows network devices such as routers, switches, servers, and firewalls to send unsolicited alert messages—called traps—to a management system when predefined conditions occur. This enables real-time monitoring and rapid response to network events including failures, threshold breaches, or configuration changes.

XMPP Link-Local / Serverless Messaging

Port 5298 is primarily used for the Extensible Messaging and Presence Protocol (XMPP) implementations targeting link-local communications as defined in JEP-0174 or XEP-0174. This enables peer-to-peer instant messaging without the need for a central server on a local network segment, ideal for ad-hoc and zero-configuration communication scenarios.

PDL Data Stream

**Port 9100** is primarily used for printing services employing the Printer Job Language (PDL) Data Stream protocol, which facilitates fast, raw printing over TCP/IP networks. It's widely implemented on networked printers, especially those utilizing the JetDirect protocol developed by HP, enabling direct print job submissions from clients without the need for intermediary print servers or additional protocols.

Mail Transfer Protocol

Mail Transfer Protocol (MTP) was an early protocol designed to transfer electronic mail reliably across computer networks. It predated SMTP and provided basic functionalities to send, relay, and receive messages, but due to limitations and evolving requirements, it was largely deprecated in favor of more robust standards like SMTP.

ISI Graphics Language

ISI Graphics Language (ISI-GL) is an early network protocol designed primarily for transferring graphical data between systems, often used in academic and research settings. It facilitates rendering commands and image data transfer over network connections, enabling remote visualization and graphical computing. Though largely obsolete today, understanding ISI-GL provides insight into the evolution of networked graphics protocols.

MATIP Type A

MATIP Type A enables the transportation of traditional airline reservation, ticketing, and messaging data over IP networks, replacing legacy airline communication systems and streamlining operations across global aviation networks.

Zephyr Notification Service

Port 2102 is primarily used by the Project Athena Zephyr Notification Service server, which provides a framework for real-time notifications and instant messaging within networked computing environments. It facilitates timely communication and collaboration among users, often within academic or research settings, by delivering alert-style messages quickly across distributed systems.

CUPS

The Common Unix Printing System (CUPS) is a modular printing system for Unix-like operating systems. It allows a computer to act as a print server, managing print jobs and queues and providing network printing capabilities across diverse platforms and devices.

LeeCO POS Server

LeeCO POS Server Service operates on port 2212, supporting both TCP and UDP protocols for communication between point-of-sale terminals and centralized LeeCO servers. It facilitates data exchange such as transactions, inventory management, and reporting within retail environments using LeeCO's POS software suite.

Battle.net Gaming

Port 3723 is widely used by many Blizzard Entertainment games through their Battle.net service, including iconic titles such as Diablo II, Warcraft II, Warcraft III, and StarCraft. The port facilitates game server communication, matchmaking, lobby coordination, and real-time multiplayer data exchange, supporting both TCP and UDP traffic to ensure smooth gameplay across different network conditions.

Simple File Transfer Protocol

Simple File Transfer Protocol (SFTP) is an early protocol designed for basic file transfer between computers on a network. Developed in the early days of the ARPANET, it facilitates a straightforward method to upload and download files using simple commands, mainly intended for smaller networks with minimal security concerns. Despite being largely deprecated today, it laid the foundation for many modern file transfer protocols.

Access Network

Port 699 is officially designated for Access Network services, used primarily in telecommunications and network management scenarios. While not as ubiquitous as standard web or email ports, it supports specific network control and communication functionalities, typically in managed access systems or proprietary telecom applications.

H.323 RAS

Port 1719 is primarily associated with the H.323 Registration, Admission, and Status (RAS) protocol, which is a core component of multimedia communication and conferencing systems. It facilitates the registration of endpoints with gatekeepers and manages call admission control and endpoint status messaging. Primarily relying on UDP transport, this port enables the negotiation and control channels necessary for VoIP calls, video conferencing, and other real-time communication services based on H.323 standards.

XNS Time Protocol

The Xerox Network Systems (XNS) Time Protocol is a legacy network service designed to synchronize time across devices within an XNS network environment. Primarily used in legacy Xerox systems, this protocol facilitated accurate timestamping and coordination across distributed computing systems where precise timekeeping was critical.

ooRexx rxapi daemon

The Open Object Rexx (ooRexx) rxapi daemon provides network-based API services that enable external applications to interface programmatically with the ooRexx interpreter, allowing for automation, scripting integration, and remote management capabilities.

LLRP over TLS

EPCglobal Low Level Reader Protocol (LLRP) over TLS facilitates secure communication between RFID readers and controlling software, leveraging TLS to provide encrypted transport. It enables standardized device management, inventory control, and data acquisition within RFID systems commonly found in logistics, retail, and supply chain operations.

LoggerNet Datalogger

Port 6789 is commonly used by LoggerNet, a Campbell Scientific software suite designed to interface with dataloggers for environmental and industrial data collection. This port facilitates data collection, device configuration, and data dissemination within monitoring networks using custom communication protocols.

Trivial File Transfer Protocol (TFTP)

Trivial File Transfer Protocol (TFTP) is a simple, lightweight file transfer protocol used primarily within local networks for transmitting files without the complexities of authentication or directory visibility. It's typically used for bootstrapping devices, transferring firmware, or configuration files in a controlled environment.

Routing Information Protocol (RIP)

Routing Information Protocol (RIP) is one of the oldest distance-vector routing protocols, widely used in small and medium-sized networks. It facilitates the sharing of routing information among routers, enabling consistent and automated updating of routing tables in an IP network environment. Known for its simplicity and ease of configuration, RIP plays an essential role in dynamic routing, though it has largely been superseded by more advanced protocols in larger or more complex network infrastructures.

Conference Call Signaling

UDP port 1167 is commonly associated with signaling traffic for telephony and conference calling solutions, particularly legacy or specialized systems. It enables the setup, management, and teardown of audio conference sessions across IP networks. The use of UDP facilitates low-latency communication ideal for real-time voice traffic, though it can introduce challenges related to reliability and security. This port is often utilized in enterprise conferencing setups or hardware appliances supporting VoIP-based conference call features.

ISAKMP

Internet Security Association and Key Management Protocol (ISAKMP) is a framework used in establishing, negotiating, modifying, and deleting security associations (SAs) for IPsec. Operating primarily over UDP port 500, it's fundamental to initiating secure, encrypted communication sessions on IP networks by managing cryptographic key exchanges. ISAKMP abstracts key management from specific encryption algorithms, ensuring flexibility and interoperability across various security protocols.

FLIR Camera Protocol

The FLIR Systems Camera Resource Protocol is utilized primarily by FLIR network-enabled cameras to facilitate command, control, and data exchange. It enables remote configuration, firmware updates, and live video streaming capabilities, making it essential for surveillance, security applications, and industrial monitoring. Despite being a proprietary and unofficial protocol specification, it has gained traction across various FLIR hardware implementations.

Netop Remote Control

*Netop Remote Control* is a remote administration tool by Netop Business Solutions, allowing IT teams to securely connect to and manage remote desktops and servers over TCP or UDP. Designed primarily for enterprise use, it provides features for support, troubleshooting, software deployment, and maintenance.

ODMR

On-Demand Mail Relay (ODMR) facilitates mail delivery by allowing remote servers to retrieve queued email messages as needed, rather than relying solely on traditional push-based SMTP delivery. This enables efficient mail forwarding in scenarios where recipient servers have intermittent connectivity or are located behind firewalls, enhancing email flexibility for ISPs and mobile users.

WSDAPI Secure Channel

Port 5358 is used by Windows devices running Vista, Windows 7, and Server 2008 for Web Services on Devices API (WSDAPI) communications over secure channels. It facilitates discovery, management, and integration of devices within a local network, enabling applications to communicate securely with devices such as printers, scanners, and IoT appliances through standardized web protocols.

Netstat Service

**Netstat Service** is commonly found on port 15 across various systems but it remains unofficial and rarely used today. It traditionally allows administrators and diagnostic tools to monitor active network connections, routing tables, interface statistics, masquerade connections, and multicast memberships on a system. Because it facilitates introspection of network activity, this port can reveal valuable insights about system connectivity.

XNS Authentication

Xerox Network Systems (XNS) Authentication was an early protocol suite designed primarily for local network communication and authentication within Xerox environments. It supported both TCP and UDP transport and served to verify identities between connected hosts, enabling access to services and secured exchanges of information inside the XNS ecosystem. While now largely obsolete, it influenced later developments in network protocols and authentication frameworks.

Internet Message Mapping Protocol (IMMP)

The Internet Message Mapping Protocol (IMMP) is designed to facilitate message synchronization and mapping between messaging systems, aiding interoperability across disparate email services and platforms. Supporting both TCP and UDP transports, IMMP aligns with multi-environment messaging needs and provides the foundation for translating message metadata effectively. Its use case centers on connecting heterogeneous communication systems without standardized protocols for efficient message delivery.

Label Distribution Protocol

Label Distribution Protocol (LDP) is a key control protocol used within MPLS (Multiprotocol Label Switching) networks, enabling efficient and scalable routing by assigning labels to data packets. It facilitates the dynamic distribution and management of labels between routers, simplifying packet forwarding decisions and improving overall network performance in large-scale, multi-service network infrastructures.

ANSI Z39.50

ANSI Z39.50 is a client-server protocol widely used in library and information retrieval systems to enable searching and retrieving information across different database systems, even if they are from disparate vendors or platforms. It supports complex queries and multi-database searches, making it a cornerstone for inter-library cooperation and resource sharing.

Cisco SCCP

The Cisco Skinny Client Control Protocol (SCCP), commonly referred to as Skinny, is a proprietary lightweight protocol developed by Cisco for use in their IP telephony solutions. It operates over TCP and UDP port 2000 to manage signaling between Cisco IP Phones and Cisco Unified Communications servers. SCCP facilitates call setup, teardown, feature negotiation, and device control within Cisco's VoIP ecosystem.

OrbitNet Message

OrbitNet Message Service is primarily known as a Peer-to-Peer (P2P) communication port historically used by eDonkey2000 and similar file-sharing applications. It facilitates decentralized messaging and resource discovery among peers within the network, enabling resilient and scalable data exchanges without relying on central servers.

Gopher

The Gopher protocol is a distributed document search and retrieval protocol designed for distributing, searching, and retrieving documents over the Internet. It preceded the World Wide Web and offered a menu-driven interface to access text-based resources. Although largely obsolete today, Gopher played a critical role in early Internet navigation and information access.

RFS Server

Remote File Sharing (RFS) is a protocol designed to provide transparent access to files and directories across a network. Operating over TCP port 556, RFS enables users and applications to interact with remote resources as if they reside locally, making distributed file management more efficient. Although largely obsolete now, RFS was historically significant in Unix environments for enabling seamless file sharing between systems.

SMUX (SNMP Multiplexer)

**SMUX (SNMP Unix Multiplexer)** is a protocol running primarily on port 199 that facilitates the integration of sub-agents into the overall SNMP agent framework, enabling modular management in network devices and systems. It allows different components to provide their own management information autonomously while coordinating through a central SNMP master agent.

CodaAuth2 Authentication

CodaAuth2 operates as the authentication service within the Coda distributed filesystem, facilitating secure identity verification and access control for networked file sharing. It enables clients and servers to establish trust, supporting seamless collaboration and data access in Coda environments.

sMessenger Service

Port 2500 is officially assigned for THE sMessenger service, which facilitates communication between sMessenger clients and its server component. It is primarily a TCP-based port used to support messaging services, maintaining persistent connections for message delivery and management.

MSMQ

Microsoft Message Queuing (MSMQ) is a messaging protocol developed by Microsoft that enables applications running at different times to communicate across heterogeneous networks and systems that may be temporarily offline. It provides guaranteed message delivery, efficient routing, security, and priority-based messaging, facilitating reliable distributed application development and integration within enterprise environments.

Munin

Munin is an open-source monitoring tool designed to analyze and visualize the performance of computers, networks, and applications. Utilizing a client-server architecture, it collects extensive metrics from various system resources and presents them through detailed web-based graphical interfaces. This allows administrators to easily monitor resource usage trends, detect anomalies, and maintain optimal system health.

Axence nVision

Axence nVision is a comprehensive network management and monitoring tool that allows IT professionals to oversee their infrastructure effectively. It provides real-time visibility into network assets, user activity, and security events, enabling efficient troubleshooting and performance optimization.

Syslog

Syslog operates primarily over UDP port 514 to facilitate the centralization of log messages from network devices and Unix systems. It allows administrators to collect, store, and analyze log data centrally, streamlining monitoring, troubleshooting, and security event analysis across distributed systems.

STMF (NTCIP 1101)

The Simple Transportation Management Framework (STMF), defined in NTCIP 1101, facilitates data communication and management for transportation systems and devices such as traffic signals, dynamic message signs, and environmental sensor stations. This protocol supports seamless integration and interoperability within intelligent transportation systems (ITS), enabling effective command, control, and monitoring capabilities.

Sassafras K2 License Server

Port 19283 is primarily used by Sassafras Software's K2 KeyServer and KeyAuditor, a comprehensive software asset management and license compliance tool. It facilitates real-time license management, usage tracking, and auditing across an organization's network, enabling administrators to ensure compliance and optimize software investments.

XNS Mail

Xerox Network Systems (XNS) Mail is a legacy protocol designed by Xerox to facilitate electronic messaging within its proprietary network architecture. Developed in the late 1970s and early 1980s, XNS Mail was foundational for early email communication in Xerox's internetworking environment prior to widespread TCP/IP adoption.

SGE Qmaster

Port 6444 hosts the Sun Grid Engine (SGE) Qmaster Service, the primary management component responsible for orchestrating distributed workload scheduling and resource allocation in a compute cluster environment. This process acts as a central point for job queue control, accepting job submissions, managing node statuses, and distributing computational tasks efficiently among available resources.

ArcLink/XT

Lincoln Electric's ArcLink/XT is a communication protocol used primarily in industrial environments to facilitate data exchange between welding equipment and control systems. Designed to optimize manufacturing workflows, this protocol leverages UDP transport to ensure low-latency and real-time communication needed for precision welding operations.

NetBackup nbdb

Symantec NetBackup's nbdb service manages critical catalog and configuration data for enterprise backup environments. It facilitates the storage and retrieval of metadata rules, schedules, and index files necessary for effective data protection and recovery. This service underpins the core backup database processes, incorporating robust management of large-scale backup operations.

Second Life Viewer Connection

Port 13000 is primarily used for communication between the Linden Lab Second Life Viewer and region simulators ('sims'), facilitating real-time virtual world rendering and interactivity. It enables the transmission of simulated environment data, avatar movement, and in-world actions over UDP, providing a responsive and immersive experience within the Second Life platform.

Axence nVision

Axence nVision is a comprehensive network monitoring and management solution used by organizations to oversee resources, track network activity, and ensure security compliance. It facilitates real-time monitoring, asset management, user activity analysis, helpdesk support, and data protection practices, typically through a centralized management console accessed over specific TCP ports.

RPC

Remote Procedure Call (RPC) enables one program to request a service from a program located on another computer in a network. It abstracts the communication process, making it easier to build distributed, client-server applications because the calling method appears as if it's local despite being remote.

Message Send Protocol

Message Send Protocol (MSP) is a legacy protocol designed primarily for transmitting short, text-based notifications between networked hosts. It facilitates simple communication by enabling users or systems to send alerts or brief messages without the need for complex email or file transfer protocols. While it once played a role in system messaging and network administrative alerts, its use today has largely been deprecated due to the prevalence of more secure and feature-rich alternatives.

Miralix InfoLink

Miralix InfoLink is a communication service port primarily used by Miralix's contact center solutions. It facilitates real-time information exchange between Miralix clients and servers within enterprise telephony environments, supporting advanced call management and integration features. This port enables seamless connection for call control, presence, and messaging services within business communication infrastructures.

Octopus Multiplexer / CROMP Protocol

Port 10008 is primarily used by the Octopus Multiplexer to facilitate the CROMP protocol, offering a platform-independent, object-based communication mechanism across diverse networked systems. It enables the transfer, management, and orchestration of distributed objects and services between various platforms, making it particularly useful in scalable, modular environments.

Xware xTrm Protocol

Xware xTrm Communication Protocol (XCP) is a specialized protocol used primarily to facilitate secure and reliable data exchange in industrial environments and enterprise-grade communication solutions. Designed by Xware, it offers custom features to ensure integrity and operational continuity across distributed systems.

MATIP-Type B

MATIP-Type B (Mapping of Airline Traffic over Internet Protocol) facilitates the transmission of traditional airline reservation and operational traffic over IP networks. It allows legacy airline proprietary protocols to be encapsulated and sent across TCP/IP or UDP/IP, enabling seamless integration with modern communication infrastructure while maintaining support for existing airline applications.

PgBouncer

PgBouncer is a lightweight connection pooler designed to optimize PostgreSQL database connections, improving performance and resource management. Acting as an intermediary between client applications and the database server, it maintains a pool of established connections to reduce the overhead of repeatedly opening and closing database connections. This efficiency makes PgBouncer particularly useful in high-traffic environments, reducing latency and enhancing scalability.

4D Database SQL

Port 19812 is primarily used by the 4D (4th Dimension) database server for SQL communication. This port facilitates the data exchange between 4D client applications and the database server, allowing structured queries and database management commands to be executed remotely. It enables seamless client-server interactions, supporting a diverse set of SQL operations required for application development and data administration within 4D's proprietary environment.

BladeLogic Agent

**BladeLogic Agent** facilitates communication between BMC's BladeLogic Server Automation platform and managed servers. It enables administrators to automate configuration, provision systems, manage software deployment, and monitor server compliance via a secure agent running on the target device.

AutoNOC

AutoNOC protocol facilitates network operations center automation and management, enabling monitoring, alerting, remote management, and automated responses for network infrastructure. It allows integration of various network devices and services, supporting seamless, automated network operations.

IMAP v3

IMAP version 3 (Internet Message Access Protocol) enables users to access and manage their email messages stored on a mail server in real time. It allows multi-device email synchronization, giving users flexibility to organize mail folders remotely and retrieve messages without downloading them permanently. This protocol version builds upon earlier iterations for improved client-server interaction, enhancing email management efficiency for both personal and organizational use.

NSCA

NSCA (Nagios Service Check Acceptor) is a utility used to securely send passive check results from remote systems and client hosts to a central Nagios monitoring server. It facilitates distributed monitoring by allowing multiple external systems to report their status centrally, improving scalability and extending Nagios capabilities.

Minger Email Verification

Minger is a lightweight protocol used primarily with email servers to verify the existence and validity of email addresses without initiating full SMTP transactions. Designed originally for integration with the MDaemon Email Server, it helps email systems quickly validate addresses to minimize bounce rates and improve efficiency in mail routing.

Operations Manager

**Operations Manager** uses TCP port 5723, primarily for communication in Microsoft System Center Operations Manager (SCOM). It enables monitoring agents to connect securely with management servers, facilitating the collection of performance data, health status, and alerts across the IT environment.

Hotline Tracker Server

Port 5498 is primarily associated with Hotline Tracker servers, which were used during the late 1990s and early 2000s to help clients locate Hotline servers hosting chat rooms, forums, and file sharing. The port facilitates server registration and discovery, enabling clients to browse available Hotline servers across the network.

Gnutella Router Alternate Port

Port 6347 serves as an alternative communication channel for the Gnutella peer-to-peer (P2P) file-sharing network. It allows clients and routers within the network to discover peers, exchange search queries, and share distributed content efficiently. Being an alternative to the primary Gnutella port helps bypass network restrictions and improve network resilience.

AURP

AppleTalk Update-based Routing Protocol (AURP) facilitates routing updates within AppleTalk internetworks, allowing geographically dispersed Apple networks to exchange routing information efficiently. It was primarily used to enable communication over wide area networks by encapsulating AppleTalk packets within IP, supporting AppleTalk's expansion beyond local segments.

rexd Daemon Control

Port 10017 has historically been associated with the 'rexd' remote execution daemon service, notably present on UNIX variants like AIX, NeXT, and HP-UX systems. This service enables the execution of commands on remote hosts, facilitating remote administration and automation. As a control port, it may manage or trigger functions related to remote code execution, although in modern systems, its use is rare and largely deprecated due to security concerns.

Sophos RMS

Sophos Remote Management System (RMS) facilitates communication between Sophos endpoint security products and central management consoles. It enables the centralized administration, policy enforcement, status monitoring, and update delivery crucial for maintaining an organization's security infrastructure efficiently.

Network Time System

The Network Time System is an application that synchronizes time across multiple systems within a local enterprise environment or over the internet. Utilizing both TCP and UDP protocols, it ensures accurate timekeeping by acting as a centralized server, distributing precise timestamps to connected devices. This aids in event logging, security audits, and ensuring coordinated operations across distributed environments.

Daytime Protocol

The Daytime Protocol is a simple network service defined in RFC 867 that provides the current date and time information to requesting clients. Operating on TCP and UDP port 13, it was historically used for testing, troubleshooting, and basic time synchronization before more precise protocols emerged.

Axence nVision

Axence nVision is a comprehensive IT management software that utilizes port 12011 primarily for communication between monitoring agents and the management console. It facilitates monitoring, inventory, helpdesk, and security policy management within enterprise networks, allowing administrators to gain deep insights into network performance and security status.

TR-069 CPE WAN Management

The TR-069 CPE WAN Management Protocol enables ISPs to remotely configure, monitor, and manage customer-premises equipment (CPE) like routers and modems. Widely used in broadband deployments, it facilitates automated provisioning and firmware updates, streamlining service delivery and support. While convenient, its exposure requires careful security management.

Ident

Ident, operating on port 113, is a protocol primarily used by Internet Relay Chat (IRC) servers to obtain the identity of a client attempting to connect. It provides simple identification by querying the connecting user’s ident daemon, which reports the username associated with a TCP connection. Although its use has declined due to security concerns and shifts to newer authentication methods, ident remains noteworthy historically in facilitating user management and access control in IRC networks.

Miralix TimeOut

Miralix TimeOut is a proprietary communication service component commonly used in telephony systems to manage call timeouts and session state within the broader Miralix Contact Center suite. It facilitates session expiration handling, improving call routing efficiency, resource management, and the overall responsiveness of communication systems.

Tor Control

**Tor (The Onion Router)** is a volunteer-operated overlay network designed to enable anonymous communication over the Internet. It routes traffic through multiple relays to obscure the user's location and usage from surveillance or network traffic analysis, promoting privacy and free access. Port `9051` is primarily used as the **Control Port** for interacting programmatically with the Tor daemon, allowing software to script or query Tor's status.

LDAP

The Lightweight Directory Access Protocol (LDAP) is an open, vendor-neutral protocol used to query and manage directory services over a network. It facilitates centralized authentication, authorization, and directory-based lookups, serving as a backbone for enterprise identity management and access control. LDAP powers a wide array of services including corporate user directories, email systems, and network resource lookups.

PrintBuzzer Socket Server

PrintBuzzer runs a network socket server on port 4007 designed to monitor, control, and remotely manage printer jobs across an organization. It facilitates real-time status updates, device health checks, and streamlined printer fleet management, enabling administrators to oversee multiple printers efficiently.

EFS Server

The Extended File Name Server (EFS) operates on port 520. It facilitates handling of file name mapping and directory services, often associated with older UNIX and DEC systems to provide name services over networks. Although largely supplanted by modern directory protocols, it historically played a role in distributed file environments.

RSVP Protocol

The Resource ReSerVation Protocol (RSVP) enables network devices to reserve resources across an IP network, supporting applications that require guaranteed or differentiated levels of service such as latency-sensitive audio and video streams.

Axence nVision

Axence nVision is a network monitoring tool that provides comprehensive visibility and control over network devices and performance.

Megaco H.248

Megaco H.248, also known as H.248 or Megaco Text, is a protocol that manages multimedia communication sessions between media gateways and media gateway controllers within next-generation networks, often used in Voice over IP (VoIP) architectures. It enables signaling and control functions essential for voice, video, and data transfer across various communication networks.

IBM MQ

IBM MQ, formerly known as WebSphere MQ or MQSeries, is a robust enterprise middleware messaging solution designed to facilitate reliable, secure, and asynchronous communication between distributed applications, regardless of platform or technology. It enables seamless integration of software components by supporting message queuing, ensuring that messages are delivered once and only once with guaranteed delivery.

Tor Directory

TCP port 9030 is commonly associated with the Tor network, specifically used for directory server communication. Directory authorities and relays share metadata about the network topology, enabling Tor clients to bootstrap, find relays, and maintain anonymity circuits. While the port is often unofficial, it plays a vital role in the Tor infrastructure's operation.

Graphics Protocol

Port 41 is officially registered for the Graphics protocol, intended for experimental or legacy graphics or imaging data transmission. However, it is rarely used in modern networks, and its initial scope of enabling graphics exchange across networked devices is largely obsolete. Today, it often appears in port lists for legacy reasons rather than active service deployment.

Megaco H.248

Megaco H.248 over port 2945 uses ASN.1 binary encoding to facilitate signaling commands for multimedia gateway control. It enables communication between call control elements and media gateways, supporting various media types within large VoIP and multimedia networks. It plays a vital role in managing complex media streaming and telephony services across distributed networks.

Who Service

The WHO service on UDP port 513 is a legacy Unix command networking service designed to remotely return information about users logged into a host system. Often bundled with early UNIX systems, it provides details such as usernames, terminal locations, and login times. Due to its age and security concerns, its usage has largely declined with modern alternatives offering enhanced security.

Remote Telnet

Port 107 is traditionally associated with the Remote Telnet service, providing remote login and command-line access to servers and network devices over plaintext connections. While Telnet was once widely used for managing networked systems, it has largely been replaced by more secure protocols such as SSH due to its lack of encryption, which poses a significant security risk when transmitting credentials and data. Nonetheless, some legacy systems or network devices may still use this port for diagnostic or management purposes in controlled environments.

Echo Protocol

The Echo Protocol is a simple service that returns any data sent to it, primarily used to test network connectivity and diagnose latency issues. Operating over both TCP and UDP, it can be useful for troubleshooting low-level network problems. However, due to its simplicity and potential misuse, it is rarely enabled by default on modern systems.

Kerberos IV

Kerberos version IV is an authentication protocol primarily used to verify the identities of clients and servers in distributed network environments. Operating over UDP port 750, Kerberos IV employs a ticket-based system to securely authenticate users without transmitting passwords in plaintext, enhancing overall security. Though widely influential, this older version has been mostly superseded by Kerberos V due to enhanced features and security improvements.

PxPlus Client Server

Port 4093 is associated with the PxPlus Client Server interface, primarily utilized for communication with ProvideX, a business application development environment. This port supports both TCP and UDP protocols for enhanced compatibility and flexibility across client-server interactions within enterprise software solutions.

D-Link SharePort

Port 9303 is typically associated with D-Link SharePort services, enabling network sharing of USB storage devices and multifunction printers across local networks on D-Link routers. This port facilitates file sharing and printer access by bridging these USB devices to multiple clients seamlessly.

Remote Mail Checking

The Remote Mail Checking Protocol (RMCP) is an early protocol designed to facilitate remote access to email servers for users to verify mail status without downloading full email content. It enables lightweight communication to determine if new messages are present, providing basic functions similar to what modern POP3 would later formalize. Its use has diminished over time due to advances in email retrieval technologies and secure protocols.

Reserved Port 1109

Port 1109 is an officially reserved port number that is currently unassigned for any specific service or protocol by the IANA. It exists as a placeholder and may be allocated in the future for an emerging technology or application. At present, it does not have any standardized or widespread use in network communication.

Cisco MGCP

**Cisco MGCP (Media Gateway Control Protocol)** is a protocol developed primarily by Cisco to control media gateways within Voice over IP (VoIP) infrastructures. It enables centralized management of signaling and call control for effective delivery of voice communications across IP networks.

WibuKey Protection

WibuKey is a proprietary hardware and software-based licensing and software protection system developed by WIBU-SYSTEMS AG. It helps software vendors secure their applications against unauthorized use, piracy, and reverse engineering by integrating with dedicated hardware dongles and specialized drivers. The system operates over network services, allowing license verification across distributed environments.

Tor SOCKS Proxy

Port 9050 is primarily used by the Tor network as a SOCKS proxy, allowing applications to anonymize their internet traffic by routing it through the Tor network. This process provides privacy and obfuscation of the user's IP address, enabling access to content anonymously across the internet, including hidden services on the dark web. While widely adopted for privacy-focused browsing, its use must be carefully managed due to security considerations.

Zabbix Agent

Zabbix Agent is a lightweight software component installed on endpoints to collect monitoring data and send it to the Zabbix Server over a designated port. Designed mainly for performance statistics, availability metrics, and system health checks, it enables centralized infrastructure and service monitoring in enterprise and open-source environments.

Hotline File Transfer

Port 5501 is primarily used for Hotline, a classic client-server software popular in the late 1990s for file sharing, messaging, and community building. This port specifically handles file transfer connections within the Hotline ecosystem, enabling users to upload and download files on Hotline servers efficiently. Despite its decline in mainstream use, some legacy systems or enthusiasts may still utilize this port for archival purposes or nostalgia communities.

ComCam IO

Port 3605 is primarily associated with ComCam IO, a service related to network-enabled surveillance cameras and communication modules. It facilitates device communication, data transmission, and control signaling between camera components and remote systems — typically operating over UDP for efficient real-time data streaming.

LPD Print Service

Port 515 is traditionally used by the Line Printer Daemon (LPD) protocol on Unix/Linux systems to manage print jobs over a network. It enables clients to submit, query, and manage printer queues remotely, facilitating distributed printing in larger network environments.

Teredo

Teredo is a network protocol designed to provide IPv6 connectivity to nodes that are located behind IPv4 NAT (Network Address Translation) devices. Implemented as a tunneling protocol, Teredo encapsulates IPv6 packets within IPv4 UDP datagrams, enabling seamless communication across IPv4 networks without requiring native IPv6 infrastructure. This ensures broader IPv6 adoption and maintains compatibility where direct IPv6 support is not feasible.

Kerberos Master Authentication

Port 751 is utilized primarily for the Kerberos master authentication service, an integral part of the Kerberos network authentication protocol. It helps facilitate secure communication for verifying user identities over insecure networks by acting as a central key distribution hub.

Sun DR

Sun Remote Dynamic Reconfiguration (sun-dr) allows administrators to dynamically modify the hardware configuration of certain Sun Microsystems servers without shutting them down. This management protocol aids in reallocating resources or replacing hardware to ensure optimal uptime and minimal service disruption.

Cisco Unified Video Advantage

Cisco Unified Video Advantage is a Cisco-designed communication solution that integrates video into Cisco IP Phones, enhancing unified communications deployments. It primarily facilitates video conferencing and collaboration over enterprise networks by managing video streams across various endpoints. The service typically uses UDP on port 5445 to enable efficient, real-time media transfer with minimal latency and overhead.

VMware VI Client

Port 901 is primarily used by the VMware Virtual Infrastructure (VI) Client, which facilitates management communication between VMware ESX/ESXi servers and the management interface. It often serves the connection flow from servers being managed back to the console, enabling user access to virtualization controls and management features.

ONC RPC (SunRPC)

ONC RPC (SunRPC) is a protocol developed by Sun Microsystems enabling remote procedure calls over a network. It serves as the foundational communication method for Network File System (NFS) and other distributed network services on UNIX systems. It supports both TCP and UDP transports to facilitate flexible and efficient inter-process communication between clients and servers in heterogeneous environments.

NetSupport Manager

NetSupport Manager is a remote control software solution widely used by enterprises and educational institutions for remote desktop management, classroom control, and IT support. It enables administrators and teachers to connect to and control multiple endpoints seamlessly over a network, providing a versatile toolset for system management, troubleshooting, and collaboration.

Diameter Protocol

Diameter is an Authentication, Authorization, and Accounting (AAA) protocol defined in RFC 3588, and a successor to RADIUS. It is used primarily in modern IP-based networks for carrying authentication, service authorization, and configuration information, especially within mobile networks and LTE infrastructure.

Gadu-Gadu C2C

Port 1550 is used for Gadu-Gadu's direct client-to-client (C2C) connections, facilitating peer-to-peer communication within this popular Polish instant messaging service. This port assists clients in bypassing centralized servers to establish direct connections for file transfers or conversations.

EMCADS

EMCADS is a proprietary communication service developed by Giritech for its G/On product suite. The service facilitates remote access and secure communication pathways between client endpoints and organizational resources, centralizing management while maintaining flexibility. It operates over both TCP and UDP, ensuring adaptability across network environments and providing robust connectivity options.

DataReel Database

DataReel Database is an embedded database library designed for developers who need lightweight data storage within their applications. It offers an easy-to-integrate solution for handling structured data with minimal overhead. This port supports both TCP and UDP connections, facilitating data management operations over the network.

Symantec vnetd

Symantec Network Utility vnetd, previously known as VERITAS NetBackup, is a dedicated communication service utilized in Symantec backup and recovery solutions. It facilitates remote management and data transfers between backup clients and servers, supporting backup operations across distributed enterprise environments.

Kerberos Slave Propagation

Port 754 is used by Kerberos version 5 to propagate database updates from a primary KDC (Key Distribution Center) to secondary or slave KDCs. This replication ensures all KDCs maintain consistent authentication credentials across the Kerberos realm, which is crucial for maintaining a unified and secure authentication environment.

Linksys PSUS4 print server

The Linksys PSUS4 is a print server that connects printers to a network, allowing multiple users to access printing functions remotely.

Xfire

**Xfire** was an instant messaging client for gamers, combining gaming-oriented chat functionality with tools for in-game messaging, server browsing, and social features. This port (25999) was notably used by Xfire’s services to manage peer-to-peer communications, facilitate matchmaking, and enable real-time chatting while gaming.

Novell GroupWise

Port 1677 is primarily used by Novell GroupWise for client/server communication, facilitating email messaging, calendaring, and other collaboration features. It supports both TCP and UDP protocols to maintain efficient connectivity between GroupWise clients and servers in a business environment.

Secure Access Control Server (ACS)

Cisco's Secure Access Control Server (ACS) running on Windows provides centralized authentication, authorization, and accounting (AAA) services for network devices. It facilitates managing user policies and securing access to corporate network resources efficiently. Operating over TCP port 2002, it supports integration with various network infrastructure elements for enhanced access control mechanisms.

CORBA IIOP URL

Port 2809 is officially designated for CORBA's corbaloc IIOP URL, following the CORBA 3.0.3 specification. It enables client applications to locate CORBA objects using Inter-ORB Protocol (IIOP), facilitating standardized distributed object communication across heterogeneous networks and platforms.

GPSD Daemon

Port 2947 is primarily used by gpsd, an open-source GPS service daemon that provides a unified interface for various GPS receivers. It facilitates communication between GPS hardware and applications by parsing receiver data and serving it in a standardized format over TCP, enabling features like location tracking and timing synchronization across networked systems.

VMware Server Alternate Port

Port 904 serves as an alternate communication channel for VMware components when the default port 902 is unavailable, often on certain Linux distributions such as SUSE. It facilitates management connections for ESXi hosts, vCenter Server, and remote console services, playing a critical role in the VMware virtualization ecosystem by enabling secure and efficient management traffic flow.

xmlBlaster

xmlBlaster is an open-source publish/subscribe message-oriented middleware (MOM) that allows clients to exchange messages in XML format. It supports a variety of protocols, enabling communication between heterogeneous systems seamlessly. xmlBlaster facilitates real-time messaging, making it suitable for complex enterprise integration scenarios.

HP System Management Redirect

Port 2301 is primarily utilized by HP System Management tools to provide a redirect service to the main HP System Management homepage, which typically runs securely on port 2381. This port facilitates initial communication and then forwards connections to the primary management interface for monitoring and controlling HP server hardware.

Sophos RMS

Sophos Remote Management System (RMS) allows administrators to remotely manage, update, and monitor Sophos security products across an enterprise. It leverages a proprietary communication protocol to facilitate command delivery, status reporting, and policy update enforcement between endpoint agents and the management console.

comsat & biff

The Comsat service, working alongside the `biff` notification utility, provides users with real-time notifications of new email arrivals on UNIX systems. It leverages UDP to listen for incoming mail notifications and alerts logged-in users when new messages are received, historically enabling immediate awareness of incoming communications.

Ginever.net Port

Port 5314 is attributed to Ginever.net, commonly utilized for data communications associated with its online platform and related gaming services. Supporting both TCP and UDP protocols, it facilitates client-server interactions necessary for real-time gameplay, server synchronization, and data transmission. This port enables seamless connectivity across diverse game features within Ginever.net’s networked ecosystem.

Message Posting Protocol

The Message Posting Protocol (MPP) operates on port 218 and facilitates the transfer and management of message posts across networked systems. It provides a mechanism for clients and servers to communicate by supporting both TCP and UDP transport. Widely referenced in official port documentation, it serves specific messaging-centric applications in distributed environments.

OpenCORE Remote Control

OpenCORE Remote Control Service is a proprietary protocol used to remotely manage or control OpenCORE systems. This service typically facilitates command execution, system monitoring, and configuration management over the network, providing administrators with flexible remote access to OpenCORE-enabled devices. Though versatile, this port's open state represents both an asset and a risk, depending on how well it is secured.

iSCSI

iSCSI, defined in RFC 3720, stands for Internet Small Computer Systems Interface. It is a network protocol that enables the transport of block-level storage data over TCP/IP networks, allowing clients (initiators) to transmit SCSI commands to storage devices (targets) located remotely. This capability facilitates Storage Area Network (SAN) implementations without dedicated fiber channel infrastructure.

Ginever.net Communication

Port 5313 is used primarily by Ginever.net to facilitate real-time data communication between servers and client applications, such as multiplayer gaming services, chat functions, or data synchronization. Its versatile support for TCP and UDP allows it to balance reliability with speed in data transfer, making it suitable for interactive network services within the Ginever.net ecosystem.

SANE Scanner Daemon

The SANE (Scanner Access Now Easy) network scanner daemon listens on port 6566 to facilitate communication between scanning clients and network-connected scanners. It allows users to remotely access and control scanners over a TCP/IP network, supporting distributed document digitization with compatible hardware and software.

MSMQ

Microsoft Message Queuing (MSMQ) is a messaging protocol developed by Microsoft that enables applications running on separate servers and processes to communicate in a fail-safe manner. By utilizing message queues, MSMQ facilitates reliable asynchronous communication between distributed applications, allowing messages to be sent even if the receiving application is not immediately available.

SNA Gateway

The SNA Gateway Access Server facilitates communication between IBM's Systems Network Architecture (SNA) and IP-based networks. It serves as a bridge, enabling legacy mainframe systems and applications to interact seamlessly with modern TCP/IP infrastructures, supporting both TCP and UDP protocols for versatile connectivity.

BOOTP/DHCP Server

Port 67 is primarily used by the Bootstrap Protocol (BOOTP) and the Dynamic Host Configuration Protocol (DHCP) servers to provide IP address assignment and configuration information to network clients. This port facilitates automated network management by enabling servers to dynamically allocate IP addresses, reducing manual configuration overhead.

Ginever.net Data Port

Port 5311 is primarily used by Ginever.net for data communication purposes. Supporting both TCP and UDP transport protocols, it facilitates real-time exchange of information essential for Ginever.net services. Though unofficial, this port serves as a dedicated channel for proprietary application data, enabling seamless user experiences within the Ginever.net ecosystem.

Network File System

2049/UDP is commonly used by NFS (Network File System), a protocol developed by Sun Microsystems that enables remote access to shared file systems across a network. It allows systems to mount disks located on remote hosts as seamlessly as if they were part of the local file system hierarchy. This facilitates file sharing, centralized management, and collaboration within distributed network environments.

RADIUS Accounting

RADIUS Accounting operates on port 1813 and is part of the Remote Authentication Dial-In User Service (RADIUS), primarily used for tracking usage and accounting purposes in network authentication scenarios. It helps network administrators manage resource consumption, billing, and audit trails by recording data usage, connection times, and user activity. Usually paired with RADIUS Authentication on port 1812, accounting ensures proper monitoring and management of network services.