I own many video games, and almost all of them have online multiplayer, and all of those work 100% fine, with the same pc, same ISP. You don't need a static port to play multiplayer, you need it to run a server. This is not a factorio limitation, if you change your telephone number after every call...

I had seen that post prior to making my own. it doesn't solve this problem (that is unique to this game), and also the IP address it expects and gets are the same, the only thing is the port number. This is beyond my control (ISP related) so does this mean that I can never play this game in multipla...

The game uses the pingpong server to determine the address, but then uses the one it expected instead of the one it gets, and this prevent multiplayer from working. Why doesn't the game just accept and use the address (port) it gets instead of the one it expects? 19.659 Factorio initialised 31.230 I...