In a very long time i have studied proxy and VPN solutions. I have a web proxy, but i want to setup a real VPN.

The reason why i want a VPN is that im going to use it on school, and there the VPN ports are blocked. So i need to setup a VPN on port 80, 21, 22 or 443.

I want my VPN so more users can use it at the same time, and with a diffrent username and password.

OS does not matter, i can use whatever its best.

Hope someone have a nice guide or something so i can put a VPN on another port

Sorry for bad English