Whenever C was in game with A and B attempted to connect, the error we received was always the same. In game it was B's LAN address "failed to connect, and was dropped" and B would receive "Unable to communicate with C's public IP address". This was the same whether B connected with A's LAN address ...

My friends and I were trying to start up a four person game of factorio on release 11.8. Let's just call each other A B C and D. The problem we had is that if A and B are in the same LAN network and C and D were across the internet then either A and B could connect to each other and that would block ...