540
UUCP
Low RiskTCP — File Transfer
Port Overview
Port Number
540
Service Name
UUCP
Transport Protocol
TCP
Category
File Transfer
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 540?
Port 540 is assigned to UUCP (Unix-to-Unix Copy Protocol), one of the earliest Unix networking protocols. Completely obsolete.
TCP
File Transfer
Security Considerations
Port 540 (UUCP) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.