Router/firewall issues

[fireopal]

Hello all, I am new here and I hope some one might help me. I have an issue which may be router/firewall related and I have next to no knowledge on that or networking systems. Me and a friend are trying to play a game online together and I try to start a stand-alone server through my own machine. On my friend's end gets messages saying I am blocking with possibility of a router or firewall or such. I have tried disabling my firewall but that had not worked.
Any help would be appreciated!

 

[DelJo63]

If your friend is connected (wired or wifi) to your router, you can fix that.

Otherwise, to gave a game server on your ISP connection with a friend elsewere on the Internet, is a real problem.
Both need firewall rules, and this one needs port forwarding from your router to your game server.

HOWEVER, that is not only a security risk, but likely in violatin of your EULA (End User License Agreement)