tftp

tftp-hpa's client: -c get downloads, -c put uploads, by file name only (there is no listing). The request goes to UDP port 69, the file in 512-byte blocks on other ports. Anyone who reaches the server can do the same, and every byte is readable on the wire. The server here is in.tftpd, serving one directory (-s), allowing new files only with -c.

tftp command usage

tftp SERVER -c get REMOTE [LOCAL]
tftp SERVER -c put LOCAL [REMOTE]

Options

-c get REMOTE LOCAL

download a file

-c put LOCAL REMOTE

upload a file

-v

say what was sent or received

tftp examples

tftp 10.0.9.10 -c put /etc/frr/frr.conf officeRouter.conf

Backs the router's saved config up to the TFTP server.

tftp 10.0.9.10 -c get officeRouter.conf /tmp/restore.conf

Fetches it back.

Pitfalls

• File must have global write permissions or File not found on a put: the server only accepts new files with -c, and existing ones only if they are world-writable.

Run it on real machines