660
macOS Server Admin
High RiskTCP — Remote Access
Port Overview
Port Number
660
Service Name
macOS Server Admin
Transport Protocol
TCP
Category
Remote Access
Security Risk
High
Port Range
Well-Known (0-1023)
What is Port 660?
Apple macOS Server administration protocol, used by the macOS Server Admin application for remote server management. Apple has since retired the macOS Server application.
TCP
Remote Access
Security Considerations
Port 660 (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.