UDP Port 5351 – pcp

About UDP Port 5351

Port 5351 carries the IANA assignment for pcp. The IANA description reads: ‘Port Control Protocol’. This port appears in 3 IDS rules and does not have notable malware activity indicators in our data.

IDS Rule References

3 IDS / security rules reference UDP port 5351. Treat that number as context, not a danger score. Many detection rules are written against groups of ports rather than one service, web ports especially, so common web alternate ports inherit large counts while genuinely sensitive services can show few rules or none. Presence in IDS rules does not mean traffic on this port is malicious.

Rule categories (top 1): attempted-admin (3).

Sample rule descriptions for UDP port 5351:

• ET EXPLOIT Possible Malicious NAT-PMP Response to External Network
• ET EXPLOIT Possible Malicious NAT-PMP Response Successful TCP Map to External Network
• ET EXPLOIT Possible Malicious NAT-PMP Response Successful UDP Map to External Network

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Emerging Threats Open Ruleset (BSD 2-Clause / GPLv2 per SID range).