I have a laptop and a desktop PC. For some reason, both have the same IP addresses. I read that each PC is provided their own address, yet, these two machines share the same address. It's very strange. I play Minecraft with my nephew on our home network and I host, or he hosts, and everything is fine. No IP conflict or anything. I just hosted a server for us of Terraria, he connected just fine on his desktop to my server. Now I'm trying to start a server on his desktop for Terraria, which does launch. But when he tries to connect to his server, it won't let him. Would it happen to be because two machines here share the same IP address?