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Cisco 3640 configuration help hosting multiple websites from one external IP.

I am currently assisting in a reconfiguration of a cisco 3640 router from hosting multiple websites (15 sites) from a one to one nat config (which I set up) to hosting multiple websites translating to one external IP due to a provider change. I just seem to be missing something, I just don't know what. I just recieved the information and the cutover is in two days.

NetworkingHardware FirewallsDHCP

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8/22/2022 - Mon

With one-to-one nat, you can have all the 15 visible to outside world on port 80, now since you have a single ip address the only option is to port forward. Now for port forward to work, all the websites can't use port 80 as their sockets.

So it can be done if you are ready to run all the 14 webservers in other ports. I don't think you want to do that :-(


Are you running 15 servers, or just hosting 15 sites? How many servers do you have? what platform?

Thanks for the responses.

Unfortunately the new provider is pushing for the use of one external IP, we can get more but they charge per IP, which will not be ready in time for the cutover. In contacting support, they also pushed for the sinle external IP, but had no ideas when it came to configuation, or knowledge of how to apply more than two sites.

There is only one web server hosing the sites running IIS.

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Can you explain "GET" commands. I'm having a blank moment.


If your IIS is HTTP1.1 compliant, you're OK.  If it's not, you're not.

It is HTTP1.1 compliant. How would I set it up? Can you help with with an example.

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