Port 631 — IPP / CUPS
Internet Printing Protocol — network printing and the CUPS print server admin UI.
| Port number | 631 |
|---|---|
| Service | IPP / CUPS |
| Transport | TCP/UDP |
| Category | Other |
Is port 631 safe?
Restrict to LAN; the admin interface can leak system info.
Frequently asked questions
What is port 631 used for?
Port 631 (TCP/UDP) is the standard port for IPP / CUPS. Internet Printing Protocol — network printing and the CUPS print server admin UI.
Is port 631 safe to open?
Restrict to LAN; the admin interface can leak system info.
Is port 631 TCP or UDP?
Port 631 commonly uses TCP/UDP.