Hamachi
From TM Wiki
Hamachi is a free virtual private networking application which connects computers over the Internet so they appear to be on a local area network. (LAN)
The software makes it possible to play TrackMania over the Internet in LAN mode. This can be useful when the Ladder goes down.
Troubleshooting
Players can have trouble joining a virtual LAN game if their IP address is entered in Forced server address within the network options. Deleting this value has been known to fix this problem.
