311
macOS Server Admin
High RiskTCP — Remote Access
Port Overview
Port Number
311
Service Name
macOS Server Admin
Transport Protocol
TCP
Category
Remote Access
Security Risk
High
Port Range
Well-Known (0-1023)
What is Port 311?
Port 311 is used by Apple macOS Server for its web-based management interface. Exposing this port externally creates significant risk.
TCP
Remote Access
Security Considerations
Port 311 (macOS Server Admin) is classified as high risk. This port is a common target for automated scanning and brute-force attacks. If you must expose it, restrict access to known IP addresses.
Recommendation: Use firewall rules to whitelist trusted IPs. Enable rate limiting and intrusion detection.