Diablo 1 HD Hellfire Mod | Awake

So I'm new to Diablo, I'm installing this because a few friends of mine want me to play a little bit with them, so I installed both Diablo and this mod. I tested it and the game lauches without any problem, but when I try to connect to Battle.net in the multiplayer option I get this:


Any known way to fix this?

I have the same issue, I can't connect to battle.net. Ports have been forwarded and instructions on the nlizzard page for ports forwarding exceptions have been followed