@RoyArtorius Yeah, that's pretty normal, especially if you're running it behind a router. You can use the -i option to set the ip to host on explicitly but usually it's not necessary: MatchUpServer.exe -i 22.214.171.124 I suspect the problem is more likely either a firewall or a router causing issues. If you're hosting the MatchUpServer behind a router you need to forward the port that it listens on (20203 by default). If you're hosting it on AWS you need to open the port in your Security Group settings. Other hosting providers may have similar settings. Since you're using the Windows version you also want to be extra sure windows is not blocking it with the built in firewall.