Creepwalker and Zelf19:
Game Host Instruction for Public Game:
Open Ports 1999 and 1345
Edit config.ini (Host Only)
[NAT] Enabled = true
PublicIP = 109.90.139.208 ; You need to change this to your router's public interface IP
Game Joiner Instruction for Public Game:
Diablo III.exe" -launch -auroraaddress 109.90.139.208:1345 (Host Public IP)
Game Host Instruction for Local Game:
Edit config.ini (Host Only)
[NAT] Enabled = false
PublicIP = 127.0.0.1 ; <---- You need to change to this
Game Joiner Instruction for Local Game:
"Diablo III.exe" -launch -auroraaddress (This needs to be Hosts Lan IP)