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New Member

2600 Router to Internet

I have a Cisco 2600 router. I have it plugged intoa catalyst switch where my pcs on the same vlan access it. The other interface is public and plugs into a shared switch which then connects into another router from our ISP out to the Internet. From the Cisco 2600 router I can ping sites by IP on the Internet. I cannot do it from PCs behind the router. I cannot browse the Internet from PCs behind the router also. On the public interface in the config there is a line - "no ip http server". I am wondering if this causing me an issue. What does this do??

What do I need to do in general to be able to configure to access the Internet from a PC behind this router??

I do not have any access lists and IP routing is enable as are both Ethernet interfaces. I know I am missing something very small.

Thank you

New Member

Re: 2600 Router to Internet

It sounds like some device between the switch and the internet does not have a route to your inside address. The internal network addresses need to be:

Internet routable


Network Address Translated to an Internet-routable address space


Your address is routable and your ISP has to add aroute to direct traffic for those addresses to your router.

Re: 2600 Router to Internet

Your router needs to NAT all packets going out of your network. More can be read here.

If NAT is already in place, check on the 2600 if you have a default route pointing to your ISP router, and also if the ISP router, knows how to get back to your network.

Re: 2600 Router to Internet

As shanky says, you should do a NAT for your private IP before putting it onto internet clould.

"no ip http server" will not cause a problem. This command is generally used to configure the router from http browser.

Just do a trace from your PC and see what is happening.

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