Port 1234. If your PC is not directly connected to the internet (e.g. you are using NAT), then you need to forward all traffic arriving from the internet on your network on this port to the IP address of the computer you are hosting SimSig from. For most people, this is a case of configuring your router. Consult your router documentation for details on how to enable port forwarding.Gareth Hale said:Hi all, what port do I need to open so then people can play my simsig games? I am on a home network.