Curated port reference

Port 67: DHCP server

DHCP server commonly uses port 67 over UDP. Review its purpose, traffic direction and operational security considerations.

67UDP

DHCP server

Server-side DHCP address and network-configuration service.

Typical use

DHCP clients broadcast requests to a server or relay on UDP 67.

Traffic direction

Client to server

Security considerations

Control rogue DHCP servers, secure relay paths and use switch protections such as DHCP snooping where appropriate.

DHCPIp Networking