Port 631 — IPP

TCP · Port 631/TCP is used for the Internet Printing Protocol (IPP), which enables printing over a network. This protocol allows devices to discover and communicate with printers, facilitating remote printing capabilities. From a security perspective, IPP can be vulnerable to attacks if not properly configured or secured.

Port Number: 631
Service Name: IPP
Protocol: TCP
Common Software: CUPS

Security Notes

Review IANA registry for port 631 usage. Apply principle of least privilege - only open ports that are required.

FAQ

What is port 631 used for?

Port 631 is used for IPP. Port 631/TCP is used for the Internet Printing Protocol (IPP), which enables printing over a network. This protocol allows devices to discover and communicate with printers, facilitating remote printing capabilities. From a security perspective, IPP can be vulnerable to attacks if not properly configured or secured. Common software: CUPS.

Is port 631 dangerous to leave open?

Review IANA registry for port 631 usage. Apply principle of least privilege - only open ports that are required.

How do I check if port 631 is open?

Use nmap: nmap -p 631 <target> or check locally: ss -tlnp | rg 631