Probably, Need a router selecting. My router make the source IP change to the WAN IP. http://gyazo.com/3e7cb31756a9db04aa1bfcbff237ad0b image mistake: x"Factorio server:11111" o"Factorio server:11112" But . I think that other router is not necessarily the same. NAT is Fucking. Co...

I use the NAT loopback enabled routers. Example) server-192.168.x.1:11111(local IP),globalIP:9.8.7.6:11111 (forwarding) myPC-192.168.x.2:11112(loacl IP),globalIP:9.8.7.6:11112(forwarding) playerA-1.2.3.4:12345(global IP) If don't use NAT loopback. use the local IP to server connection.　 can : myPC--...

MP mode can 2-4 people. cant 5~ people. yet
4~5th connect player black out and all other players freeze ;D