TCP Port 1556 – veritas-pbx

About TCP Port 1556

Port 1556 carries the IANA assignment for veritas-pbx. The IANA description reads: ‘VERITAS Private Branch Exchange
IANA assigned this well-formed service name as a replacement for "veritas_pbx".’. 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 TCP port 1556. 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): web-application-attack (3).

Sample rule descriptions for TCP port 1556:

• ET EXPLOIT NB8-01 – Unauthed RCE via bprd
• ET EXPLOIT NB8-02 – Possible Unauthed RCE via nbbsdtar
• ET EXPLOIT NB8-04 – Possible Unauthed RCE via whitelist bypass

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).