Ovid did propose an alternate solution.

He said to learn how to lock the box down properly and then don't bother with the fake telnet client.

I second that and if the Linux box is Red Hat or a Red Hat derivative I can specifically recommend downloading and trying out Bastille Linux (a series of scripts to walk you through locking your own box down) to both improve your security and teach you what some of the issues are. (Alternately look at OpenBSD.)