631
IPP
Medium RiskTCP/UDP — System & Infrastructure
Port Overview
Port Number
631
Service Name
IPP
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 631?
Internet Printing Protocol (IPP), used by CUPS and modern printers for network print job submission and management. Standard print protocol on macOS, Linux, and Windows 10+. Supports encryption via IPPS over TLS.
TCP/UDP
System & Infrastructure
Commonly Used
Security Considerations
Port 631 (IPP) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.