Port 68 — DHCP client
Quick reference for TCP/UDP port 68, used by DHCP client. Includes what the service does, security guidance and related ports.
Port
68
Protocol
UDP
Service
DHCP client
What is port 68?
DHCP client receives offers from the server.
What port does DHCP client use?
DHCP client listens on port 68 by default.
Security guidance
Medium risk — open with care
Port 68 (DHCP client) can safely face the internet if you keep the software up to date, restrict admin endpoints, and use TLS where possible. Audit who can reach it and watch your logs.
Related ports
Frequently asked
What is port 68 used for?+
Port 68 is the standard TCP/UDP port for DHCP client. DHCP client receives offers from the server.
What port does DHCP client use?+
DHCP client listens on port 68 by default.
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