Tunngle is another free VPN program which is currently the home of most Fleet Operations' players. To download this software Click here. No special drivers are required for 64-bit operating systems.
After having downloaded Tunngle, you will need to register a free beta account at the website Here. After a confirmation email is sent, click the link to activate your account. Install Tunngle and let the adapter configure itself (remember that you will need to disable any other network adapters from similar VPN programs, such as Wippien or Hamachi).
Wait, till it connects you to the network. Once you are connected, you will have a main screen.
Click the communities tab on the main screen.
Launch Tunngle.Login into your account, the one you registered on their website.Wait, till it connects you to the network. Once you are connected, you will have a main screen. Under this tab, you will see lot of game categories. Choose the one in which your game resides and then select your game.Enter into any game room, minimize tunngle and launch your game.
Once you are in a game room.You will see the hosted servers in that game room under the LAN section of your game if anyone is hosting. Join any of them or you can host yourself for others to join it.
You can also see the video tutorial:
This is the primary Guide of Tunngle.
You also have the following things as @Kevepeter Said :
"" Make sure you have at least 24 kb/s of download and upload speed . At the same time, make sure your ISP allows port forwarding.""
I think it's not be a good step to make a section for Tunngle only.As It's running as a beta version.