Port
Port 67 — DHCP server
Port 67 (UDP) is used by DHCP server. Dynamic Host Configuration Protocol — server side that leases IP addresses.
Port 67 at a glance
| Property | Value |
|---|---|
| Port number | 67 |
| Transport | UDP |
| Service | DHCP server |
| Category | Well-known port |
What it is used for
Dynamic Host Configuration Protocol — server side that leases IP addresses.
Security considerations
Rogue DHCP servers cause outages. Use DHCP snooping on switches.
See our full TCP/UDP port reference and learn how firewalls filter ports in the CyberOps course.
Frequently asked questions
What is port 67 used for?
Port 67 (UDP) is used by DHCP server. Dynamic Host Configuration Protocol — server side that leases IP addresses.
Is port 67 TCP or UDP?
Port 67 uses UDP.
Is it safe to open port 67?
Rogue DHCP servers cause outages. Use DHCP snooping on switches.
Related
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