Wow that’s going to be tough, the simple answer is yes it’s possible. By installing web server software like apache on your computer you can host a website off that computer. There are however a few problems which are very likely to impede your web hosting aspirations:

A) Firewall rules - May not allow HTTP Traffic to flow in thru the Gateway or the shared internet connection, (if you have access to the control panel on the gateway you can add a rule allowing the traffic)

B) Dynamic IP Address - If your Gateway uses PPP or some other controlled access system to start / stop traffic then there’s a good chance your IP address is always changing, making it hard to host a website because the address would be different every time


If you’re serious about hosting a site check and see if your ISP has any website space allocated for your account

If you aren't going to have a lot of traffic and want to host the web site yourself then you can look at www.dyndns.org to take care of the Dynamic IP problem. I would recommend spending $50-$100 and buying a router and eliminating the ICS though. It would make the setup much simpler. Then you could just forward all request on port 80 to the web server.