Okay, so my server is working fine, people can connect and its all good. but when it's hosted upstairs, and I want to get on it downstairs on the mac, it says it's dead? Server hosted on the PC, can't get on with a mac? Do I have to port forward for both computers? I would like to know why I cant join the same server on different computers. My friend is hosting a server upstairs, (Port forwarded) and I can't join it downstairs (Un-port forwarded)?