Port forwarding on Cisco 837 ADSL

Unanswered Question
Mar 18th, 2010


I have registered a domain with DYNDNS and I need to give access to a Web server over an ADSL line.

This dynamic mapping will still enable to point to the same location even when the IP address of the ADSL router changes.

When I ping the registered domain, a reply is obtained from the interface Dialer1 of the router.

With the actual configuration, the Web server is having access to the Internet.

I understand that I need to direct the http traffic from the Internet to the Web server so that users from outside can get access to the Web server.

I could use an:

ip nat inside source static <web server ip> <public ip address>

and an access-list to permit traffic from the Internet

on a line with static public ip addresses.

Can you please help about how to configure the port forwarding to the Web Server on the ADSL line.

Please find attached the topology and configuration.

Thanks and regards,


I have this problem too.
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