Restrict outgoing telnet but allow incoming telent on same box

[Jason_97]

How do I allow users to telnet into one specific server for which they are authorized but prevent them from being able to telnet from that box to other servers ? Also, will SSH or NIS+ help?

Thanks a lot.

[Jonathan Sharp_1]

Move the telnet binary to somewhere else (to your home directory per say. But if you're trying to do any sort of control, look at chrooting a user's shell and remove the telnet binary from the chroot. See http://ibiblio.org/pub/Linux/docs/howto/Chroot-BIND-HOWTO (while this is chrooting bind, it should get you started in the right direction)

[Stuart Browne]

The other option is a network/firewall option, deying anything not bound for the local interfaces with a destination port of 23 (telnet).