Port 623ASF-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..
- transport
- udp
- in transit
- cleartext
- assignment
- official
- risk
- 4/10
- lookups
- 20,465
single transport
payload readable on path
registered with iana
caution
rank 121 of 993 · top 12%
Technical Details
what runs on :623Overview
ASF-RMCP (Alert Standard Format Remote Management and Control Protocol) is part of the DMTF (Distributed Management Task Force) Alert Standard Format standard. It enables remote access and management of systems at the hardware level using a lightweight message protocol. ASF primarily uses UDP port 623 for communication.
How ASF-RMCP Works
ASF-RMCP operates over UDP and allows management consoles to monitor and control system components by interacting directly with management controllers embedded in hardware, such as Baseboard Management Controllers (BMCs). ASF defines a message-based protocol for:
- Asset information retrieval
- Remote alerts and notifications
- Power control functions (power off, reboot, etc.)
ASF-RMCP is typically implemented in conjunction with other standards such as IPMI (Intelligent Platform Management Interface) but serves as a simpler, standardized method for out-of-band management.
Protocol Details
ASF-RMCP uses UDP datagrams to send and receive messages, which include information about system status, alerts, or management commands. It leverages operations defined by DMTF to ensure interoperability between varied hardware and management software vendors. The protocol itself is connectionless, designed for quick and lightweight transactions suitable for firmware implementations.
Security Information
exposure of :623risk score
4/ 10caution
worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.
remote access averages 4.0 across 110 ports — this one sits level with it.
in transit
cleartext
credentials and payloads are readable by anyone on path
assignment
official
registered with iana for this service — scanners fingerprint it by number
reachable over
udp
udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite
security overview
Common Vulnerabilities
- ASF-RMCP communication occurs unencrypted, making it vulnerable to packet sniffing, which may expose sensitive management commands or data.
- Susceptible to spoofing attacks, where an attacker impersonates a legitimate management console to send malicious commands.
- Can be targeted by Denial of Service (DoS) attacks by flooding with malformed or excessive packets.
- Potential vector for unauthorized remote control of device power states or access to system status information.
Common Mitigations
- Restrict network access to port 623 using firewalls or network segmentation, allowing only authorized management hosts.
- Utilize VPNs or secure management networks to encapsulate ASF-RMCP traffic.
- Monitor and log management port traffic to detect anomalies or unauthorized attempts.
- When possible, disable ASF-RMCP if more secure, encrypted management protocols (e.g., IPMI over LAN with encryption, Redfish) are available.
- Keep platform firmware up to date to mitigate known vulnerabilities related to ASF implementations.
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risk mix of the 8 listed
- safe13%
- caution88%
0 of 8 encrypted