Dictionary · Protocols and Ports
TFTP
TFTP — Trivial File Transfer Protocol
File transfer · Intermediate
A minimal file-transfer protocol on UDP 69 with no authentication in the base design. Devices use it to fetch a boot image or configuration on a trusted local network.
It is intentionally simple: a device can download a file without a login. That simplicity is dangerous outside a network you tightly control.
Example: A phone or switch downloads its configuration at boot from a local server that is not reachable from the Internet.
Ports
- UDP 69 — Simple file transfer
Common misconception
- It is not a secure replacement for ordinary file transfer. It lacks the authentication people expect from a file service.