// REFERENCE
Port 631 (IPP / CUPS)
Protocol: TCP
Service: IPP
Medium risk
IPP: the modern printing protocol, the base of CUPS on Linux/macOS. The CUPS web interface lives here; exposed it has had serious vulnerabilities. Keep it local or on the LAN.
Related tools
Work with this in:
Related
67
Port 67 (DHCP server) 68
Port 68 (DHCP client) 123
Port 123 (NTP) 161
Port 161 (SNMP) 162
Port 162 (SNMP Trap) 179
Port 179 (BGP)
Port 67 (DHCP server) 68
Port 68 (DHCP client) 123
Port 123 (NTP) 161
Port 161 (SNMP) 162
Port 162 (SNMP Trap) 179
Port 179 (BGP)
Assignments per the IANA port registry. Educational content.