Port 69 — TFTP
Quick reference for TCP/UDP port 69, used by TFTP. Includes what the service does, security guidance and related ports.
What is port 69?
Trivial FTP, often used for router firmware updates and config backup.
What port does TFTP use?
TFTP listens on port 69 by default.
Security guidance
Medium risk — open with care
Port 69 (TFTP) 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.
Frequently asked
What is port 69 used for?+
Port 69 is the standard TCP/UDP port for TFTP. Trivial FTP, often used for router firmware updates and config backup.
What port does TFTP use?+
TFTP listens on port 69 by default.
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