TCP Port 541 – uucp-rlogin

About TCP Port 541

The Internet Assigned Numbers Authority (IANA) registers port 541 for uucp-rlogin. The IANA description reads: ‘uucp-rlogin’. This port appears in 6 IDS rules and does not have notable malware activity indicators in our data.

IDS Rule References

6 IDS / security rules reference TCP port 541. Presence in IDS rules does not mean traffic on this port is malicious. These are patterns security tools monitor.

Rule categories (top 1): attempted-admin (6).

Sample rule descriptions for TCP port 541:

• ET EXPLOIT Fortinet FGFM Arbitrary Code Execution via Externally-Controlled Format String (CVE-2024-23113)
• ET EXPLOIT Fortinet FortiManager Unauthenticated Get File Transfer Handle
• ET EXPLOIT Fortinet FortiManager File Transfer Handle Response
• ET EXPLOIT Fortinet FortiManager Unauthenticated Remote Code Execution (CVE-2024-47575) M1
• ET EXPLOIT Fortinet FortiManager Unauthenticated Open Server-Side Channel

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).