03-12-2004, 05:05 AM
I am by no means an expert on this but since I play through a router which has a firewall built in, it was necessary for me to open ports which Diablo requires in order to play on battlenet. The ports required for Diablo1 are 6112-6119 TCP and UDP both out and in. If you are playing through a firewall you will need to open those ports. I cannot tell you how to do this since I do not know your operating system but in XP you would go to network connections in control panel and right click on LAN Connection and select the advanced tab. Perhaps those more knowledgeable could be more specific.