TCP Port 42 – name

About TCP Port 42

Port 42 is registered with the Internet Assigned Numbers Authority (IANA) for name. The IANA description reads: ‘Host Name Server’. 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 42. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 3): attempted-user (1), misc-attack (1), attempted-admin (1).

Sample rule descriptions for TCP port 42:

• OS-WINDOWS Microsoft Windows WINS overflow attempt
• OS-WINDOWS Microsoft Windows WINS name query overflow attempt TCP
• ET EXPLOIT Possible WINS Server Remote Memory Corruption Vulnerability

Data Sources

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