Port 660

mac-srvr-admin · TCP/UDP

RangeSystem/well-known port (0–1023)
ProtocolTCP/UDP
Servicemac-srvr-admin

Frequently asked questions

What is port 660 used for?

Port 660 is registered with the IANA for mac-srvr-admin (TCP/UDP). Description: MacOS Server Admin.

Is port 660 a well-known port?

Yes. Port 660 is in the range 0–1023 (system or well-known ports). On Linux and macOS only privileged processes may bind to these ports.

How do I check whether port 660 is open?

Locally on Linux with ss -tulpn | grep ':660\b', on Windows with netstat -ano | findstr :660. To test a remote host use Test-NetConnection <host> -Port 660 in PowerShell or nc -zv <host> 660 on Linux/macOS.

How do I open port 660 in the firewall?

Ubuntu/Debian (ufw): sudo ufw allow 660/tcp. Fedora/RHEL (firewalld): sudo firewall-cmd --add-port=660/tcp --permanent, then firewall-cmd --reload. Windows (PowerShell as administrator): New-NetFirewallRule -DisplayName "Port 660" -Direction Inbound -Protocol TCP -LocalPort 660 -Action Allow.

IANA registry entries

ProtocolServiceDescription (IANA)
TCPmac-srvr-adminMacOS Server Admin
UDPmac-srvr-adminMacOS Server Admin

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