Port 77776 services

6 entries are registered on port 7777. It is a registered port (1024–49151) — IANA records an assignee, but nothing stops other software from listening here, which is why the number carries more than one entry.

entries
6

services registered on this number

transport
tcp · udp

2 transports in use

in transit
1/6

entries encrypted on the wire

worst risk
5/10

1 of 6 iana-registered

Services on this port

ranked by lookups
portservicerisk
:7777iChat Transfer Proxycaution
:7777Xivio Chat Servercaution
:7777OCFS2caution
:7777Unreal Tournament Servercaution
:7777Tini Backdoorcaution
:7777cbtsafe

01iChat Transfer Proxytcp · unofficial · risk 5/10

Port 7777 is commonly used by Apple's iChat server as a file transfer proxy, enabling peer-to-peer file sharing when direct connections are not feasible due to network restrictions like NAT or firewalls.

port 7777 as iChat Transfer Proxy

02Xivio Chat Servertcp · unofficial · risk 4/10

Port 7777 is commonly known for hosting the Xivio.com chat server interface. This port facilitates text-based real-time communication, enabling users to connect to Xivio’s live web chat service. It handles incoming client connections and relays chat messages between users across various channels, forming the backend connectivity layer for the chat platform.

port 7777 as Xivio Chat Server

03OCFS2tcp · unofficial · risk 4/10

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.

port 7777 as OCFS2

04Unreal Tournament Serverudp · unofficial · risk 4/10

Port 7777 is primarily used as the default server port for the Unreal Tournament series, enabling multiplayer gaming sessions over the internet or local networks. It predominantly facilitates communication between game clients and servers, allowing players to join matches, synchronize game state, and exchange gameplay data effectively using the UDP protocol.

port 7777 as Unreal Tournament Server

05Tini Backdoortcp · unofficial · risk 4/10

TCP port 7777 is commonly linked to the Windows backdoor malware tini.exe, a lightweight but effective trojan that provides remote shell access to compromised hosts. Frequently leveraged by attackers to create a hidden foothold, tini.exe listens for incoming connections, enabling unauthorized command execution and control on targeted Windows systems.

port 7777 as Tini Backdoor

06cbttcp · udp · iana-registered · risk 1/10

CBT is an obscure service assigned to TCP/UDP port 7777; its protocol and normal deployment are not publicly characterized.

port 7777 as cbt

Which one is on your host

ask the machine, not the registry

The registry says what 7777 is registered to. What is listening on it right now is decided by the host, and only the host can be asked. Each of these prints the process behind the socket.

linux
ss -ltnp | grep ':7777\b'
macos
lsof -nP -iTCP:7777 -sTCP:LISTEN
windows
netstat -ano | findstr :7777

On Linux and Windows the process name comes back with the socket; on macOS lsof needs sudo to name a process that isn't yours. Match what it prints against the 6 entries above.

A port number is not a service. Anything may listen on 7777 — what you actually met is decided by the host, not the registry. If a service is missing here, it belongs in the registry.

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