A couple of friends and I have been playing WC3 at school for some time and we have wasted a lot of time playing only 1vs1 because we didnt know how to play it over a wireless network. I decided to share that info with you
1. Open WC3.
2. Go to options.
3. Click "Gameplay".
4. Change the port from 6112 to 27015.
5. ???????
6. PROFIT!
Now just create a game as LAN and you will get the game up normally. (If you are on the same wireless network that is ^^.)