Try to use PAM (port to application mapping) feature
(You need IP/FW feature set for PAM). Then allow access to Your "secret" 
port and deny access to famous (23) port with access list.

PAM at CCO
http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120t/120t5/iosfw2/iosfw2_3.htm

Good luck.

Jonathan Mian wrote:

> Ok this may be a really dumb question, but what the heck.
> 
> Is it possible to chabge the telnet port from 23 to lets say 5023 (assuming
> its not used by anything else.) I would like to do this for my Cisco
2511-RJ
> to provide better security for the lab.
> 
> Any pointers are most welcome, even the funny ones :-)
> 
> Cheers,
> 
> Yeti-GBR1




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