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Port

Port 67

Conventionally used by DHCP. Port assignments are conventions, so confirm the actual listener before you write a rule around this number.

UDPEncrypted: No

Protocols on this port

DHCP

Automatic host configuration

Security: Rogue servers; enable DHCP snooping on access ports

UDP · Encrypted: No

Where this port appears in the documentation

DHCP

Dynamic Host Configuration Protocol automatically issues IP addresses and network configuration to clients as they join a network.

Exposure guidance

Decide reachability from the identity of the caller, not from the port number. If the service on this port carries credentials or administrative control, restrict it to an administrative network, require strong authentication, and log every session that reaches it.

Nearby ports

Port 53Port 68

In the knowledge graph

Open the interactive map centred on this entity to see everything it connects to and travel outwards from there.

Explore port 67 in the knowledge graph