telnet cannot connect

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Apr 6th, 2009
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Hi, i have a strange problem with my cisco 837. I can telnet to it from my local lan no problems but when i try to telnet to it from work or any external ip it will not and eventually times out. I did have an access list applied to the vty lines but i allowed my work ip address and could see the match counter increment on the allow statement. I have now completely removed the access list but the problem remains.


Trying 82.12.xxx.xxx...

telnet: connect to address 82.12.xxx.xxx: Connection timed out


line vty 0 4

session-timeout 35791

exec-timeout 35791 0

logging synchronous

length 0

transport preferred telnet

transport input telnet ssh

transport output all


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borderblaster Mon, 04/06/2009 - 11:06
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took me a little while but figured it out. I had my internet connected nat'd, the route map pointed to an access list which said permit ip any any. This was causing the remote telnet/ssh problems. The nat access list needed to be for the inside networks permited only i.e. something like permit 192.168.1.0 0.0.0.255 any.

omar.elmohri Tue, 04/07/2009 - 05:43
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On the NAT access-list you need to deny the telnet traffic toward the router.

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