When I found OpenVPN, I thought it was the best and easiest VPN I had seen. However, it still requires very long configuration and port forwarding behide NAT. Luckily, it is able to run over TCP to prevent problems caused by NAT. Today, I found alternative promising solution called Hamachi. It states that it offers LAN over Internet with zero-configuration VPN and secure peer-to-peer technology. Amazing!

In more detail, it is just a VPN running on UDP-based P2P network. Packets are usually transmitted through 3rd parties to the destination. Hamachi is almost decentralized. It is very similar to Skype but also provides a virtual network interface using TUN/TAP to Hamachi network.

The most interesting idea of Hamachi is you are able to create a private network using just a name and a password. Then you can join to existing networks and found your friends. You should be able to join no matter where you are because there are more than 2,000,000 Hamachi peers right now.

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