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I have just purchased Comcast Business Class internet (CBC) for my small business and I am acustom to being able to use my own equipment. Normally to direct HTTP traffic to a server on my local LAN all I have to do is port forward 80 incoming to the correct IP. I am completely lost with CBC and my SMC router. I have tried several configurations and it seems the only configuration I have been able to get working semi-correctly is giving the server the Static IP I wish it to have and setting everything else manually.

I have read at several locations this is an easy setup. 1-1 NAT with port forwarding should do the trick. This isn't working for me at all. It does indeed direct HTTP traffic, but it only directs the traffic to my SMC router login page. The traffic never actually gets past the router.

I tried talking with Comcast Tech support and they are either unwilling, or unknowing.

I have Ubuntu 10.04 setup and have a static IP I can use. How can I get this sucker to the outside world.

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migrated from superuser.com Jan 26 '11 at 15:46

This question came from our site for computer enthusiasts and power users.

Can you clarify what Modem/Router you're using? –  ErnieTheGeek Jan 31 '11 at 21:37
My money's on "unknowing" –  Tom O'Connor Mar 12 '11 at 13:39

2 Answers 2

Just want to clarify if you have port forwarding setup correctly.

Suppose the LAN IP of your router is and that of the server is

You would setup port forwarding on the router to forward port 80 to and not

In case you have allowed your router to be administered using your WAN interface disable that.

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The 1-1 NAT worked, but since I am on the local lan for some reason even using the external static IP I was still shown the login page. After talking with tier two support I discovered this setup isn't ideal. I think I figured out how it should be done now. –  Ryein Cardale Goddard Jan 31 '11 at 20:40

If your on the local lan you won't beable to see the website from the external IP. You can test your setup using a proxy.

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