Is it allowed for private servers?

1034704 Hamachi is a possible other programm, but Hamachi's free version only allows 5 people to join the server.

1034980 Only 5 people? I don't really use Hamachi that much, didn't know it was only that many.

1038573 I used Hamachi for nearly a year about two years ago. But then Hamachi turned their servers off for some reasons and my friends and I switched to Tunngle. It may not be as good as Hamachi, but it is unlimited and free....