Guys, please help. I installed Hamachi, and we created a virtual network with a friend. If I create a game, he sees it and joins, but if he creates it, I don't see it, and the game says that the IP address was not found. Even if I create a game and he joins, after a few days (in-game days), it says that he left the game, and he sees that I left. We also tried using Tunngle (a program similar to Hamachi), but it's the same problem. My friend has a static external IP address, and I have a dynamic one.
I have two computers at home (a PC and a laptop), and I tried playing with my brother on the local network (the local network goes through a router), but even on the same network, the games don't see each other.