dpwm
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As practice has shown, Game Ranger is a very finicky thing. Everyone has the same version of the game, and almost everyone has it installed on a clean Windows system. The necessary ports are open, but it still connects intermittently. In short, it takes a whole week of troubleshooting just to start playing.
Heroes 3+ is a whole different story.
We decided to switch to Hamachi and are currently learning how to use it.