:638
(TCP/UDP)
MCNS-SEC
Low RiskTCP/UDP — Security & VPN
On this page
Port Overview
Port Number
638
Service Name
MCNS-SEC
Transport Protocol
TCP/UDP
Category
Security & VPN
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 638?
MCNS Security. Multimedia Cable Network System security protocol for cable network authentication.
TCP/UDP
Security & VPN
Security Considerations
Port 638 (MCNS-SEC) 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.