telnet's bad (see previous rsh discussions).
Use ssh.
In sshd_config you can block access PER USER.

telnetd is just not that robust.
Alternatives including using a telnet proxy (the TIS one
let you use S/Key or other Challenge/Response devices).


Quoting Shyam Kumar Mangayil (linuxhelpin@yahoo.co.uk):
> 
> I am hosting a couple of sites at my server , and my style is by creating a username - password for every client that I host : Some may have to be denied telnet , others ftp .
> 
> How do I deny a user (say user xyz , that I assossiate with xyz.com ) , from telnet ?
> 
> Thanks,
> 
> Shyam
> 
> 
> 
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