Mike has totally called how great this piece of networking software is. It blows SSH tunnels out of the water! It could use some GUI for Linux, but I’m fine with the command line if all I have to type is “hamachi start”. Just make sure with Linux that you follow the Linux guide, section 3.3 to run it as a user process. Running as root is for n00bs

Hamachi : Stay Connected

With Hamachi you can organize two or more computers with an Internet connection into their own virtual network for direct secure communication.

Hamachi is fast, secure and simple. It is also free.