Linksys-tftp is a BSD tftp client for the non-standard tftp
authentication process used by some Linksys routers.

These routers include the BEFW11, WRT54G and WRT54GL

They all need a password for the tftp firmware file transfer to work.

For example to upgrade a Linksys WRT54G router at 192.168.1.1 with
tomato firmware, WRT54G_WRT54GL.bin, where the password is admin

$linksys-wrt 192.168.1.1
linksys-tftp>verbose
linksys-tftp>binary
linksys-tftp>blocksize 512
linksys-tftp>rexmt 1
linksys-tftp>timeout 30
linksys-tftp>trace
linksys-tftp>put WRT54G_WRT54GL.bin admin
linksys-tftp>quit