87
ttylink / link
Low RiskTCP — Messaging
Port Overview
Port Number
87
Service Name
ttylink / link
Transport Protocol
TCP
Category
Messaging
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 87?
Port 87 (also called 'link') was used for terminal-to-terminal chat on UNIX systems. It predates modern messaging systems and was common in 1980s UNIX environments. It is entirely obsolete.
TCP
Messaging
Security Considerations
Port 87 (ttylink / link) 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.