How to get games work with Hamachi on Windows 7
NAT-Routing and port-forwarding
If your internet connection is NAT-routed, it is possible that you have to add port-forwarding settings to your router. Here is the ports that Hamachi uses:
TCP 12975 (initiator port)
TCP 32976 (session port)
UDP 17771 (relay connection port)
I checked my network monitor:
Hamachi is currently using 12975, but its good to forward all of those 3 ports.
So that's it! Me and my friends setup Hamachi like this, and we can ping each other and see created LAN games. We have played Torchlight 2, WarCraft 3, Supreme Commander 1, etc etc...