edit: Port 28000 is the default, but you can check your port number in the Advanced tab of the Start Game menu if needed.
Is this right?
1. Press windows+R2. Type "cmd" and hit enter3. Enter "ipconfig" into the command prompt4. Verify your local IP is 192.168.2.4 (what it is on the forwarding page)This might help.
With the server closed, navigate to "config/server". Open prefs.cs, find the line called $Pref::Server::Port, and make sure that the value is 28000.
Try making an exception in Advanced Firewall for that port.