If another player is unable to join your hosted Warcraft III custom game on Battle.net, the most common causes are internet-connection sharing, a firewall blocking data, or a misconfigured router. Follow the steps below to address the issue.
- Make sure you have the latest software updates installed from your firewall provider.
- Make sure your firewall is properly configured to allow access to on all game ports.
- The game's default port is configurable and may have been changed. Follow these steps to check the current port in use:
- Start Warcraft III.
- Click Options.
- Click Gameplay.
- Locate Game Port. Make sure your software and hardware firewalls are configured to allow access to this port.
- Make sure you have the latest firmware updates installed from your router manufacturer.
- Configure the game port Warcraft III will use on each computer:
- Example: Computer #1 can use port 6112, computer #2 can use port 6113, computer #3 can use port 6114, and so on.
- Configure your router to forward the ports set above to each corresponding computer. For example, if you set Computer 3 to use port 6114, forward port 6114 to Computer 3's IP address.
For more information on configuring your router, contact your router manufacturer. PortForward.com is a useful third-party site that contains port forwarding walkthroughs for most router models.