Did u make sure ur PC has a static IP/DHCP?
- Log into your Router by typing in the default IP into your browser(The IP is usually on the back of the router, together with username/password).
- Add device(the pc your playing from) into static DHCP.
- Go into network setting → NAT → Add Port Forward.
- Enter your WAN IP(make a google search “what is my wan ip”), Server IP address(The static DHCP, from step 2), Port:6112-6119, change to TCP/UDP and activate and add/save.
- Pull out your Ethernet cable and plug it back in.
That should be it.
I was just checking out Warcraft 2 battle net, with a couple of people I met in the chat, that too works flawlessly.
Edit: Corrected info in step 4!!! As of today, both static DHCP and Default IP address.