Hi, as already mentioned in another thread there is an easy possibility to secure your telnet.
passwd from busybox will not work. You only need to add "login"
the real passwd-file is on hdd
there is a symlink from /etc/passwd to /tmp/passwd and that's a symlink to /shares/MYVOLUME1/__pdc/passwd
(easiest way is to compile the editor vi with busybox - telnet to your router [.cgi-trick] and edit the passwd-file in __pdc [copy e.g. the encrypted password from a share to root]; after that compile login and you will have at least a bit more secure telnet)