Internet sharing on the home small network!

[Woomera]

i didnt a search for this threat and there has already been some posts but couldnt find my answer.im looking for a free proxy software for sharing internet on my home lan with other computers,now so far i came to freeproxy which is light and easy to use like i want but IT ONLY FORWARD HTTP connections.now im looing for something that forward any packet on any port like NAt in microsoft RAS servers.

i also dont want a command based software(i want it with gui cause its easier to work with).