Port 111 — RPCbind

TCP/UDP · Port 111/TCP/UDP is used for the Remote Procedure Call (RPC) binding service, which allows clients to discover and bind to RPC services. This port plays a crucial role in network security as it enables communication between systems and facilitates remote access.

Port Number: 111
Service Name: RPCbind
Protocol: TCP/UDP
Common Software: rpcbind, portmap

Security Notes

Review IANA registry for port 111 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 111 used for?

Port 111 is used for RPCbind. Port 111/TCP/UDP is used for the Remote Procedure Call (RPC) binding service, which allows clients to discover and bind to RPC services. This port plays a crucial role in network security as it enables communication between systems and facilitates remote access. Common software: rpcbind, portmap.

Is port 111 dangerous to leave open?

Review IANA registry for port 111 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 111 is open?

Use nmap: nmap -p 111 <target> or check locally: ss -tlnp | rg 111