TCP Port 113 – auth

About TCP Port 113

Port 113 carries the IANA assignment for auth. The IANA description reads: ‘Authentication Service’. This port appears in 2 IDS rules and does not have notable malware activity indicators in our data.

IDS Rule References

2 IDS / security rules reference TCP port 113. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 2): attempted-recon (1), attempted-admin (1).

Sample rule descriptions for TCP port 113:

• INDICATOR-SCAN ident version request
• SERVER-MAIL Sendmail 8.6.9 exploit

Data Sources

This information is compiled from: IANA Service Name and Transport Protocol Port Number Registry and Snort Community Rules (GPLv2).