Who is your ISP?
Battle.net is designed to work with any 32-bit TCP/IP connection, however your Internet Service Provider or network may use a firewall or proxy server that is configured to restrict ports that Battle.net needs to send and receive game data. Contact your ISP or network administrator and ask them to open Port 6112 to send and receive both UDP and TCP packets.
Solution 1 of 1
AOL users
To connect to Battle.net via AOL, make sure you are running the latest version of the AOL software.
To check the version you are using:
Run AOL
Click on Help from the menu
Select "About America Online"
For information on downloading and installing the latest version of AOL:
Connect to AOL
Click on the Keyword button
Type "UPGRADE" then click GO
Select the latest AOL version available.
Follow the Online Instructions
Make sure you are connecting to AOL with parental controls turned off. If you have continuing problems try logging onto AOL using the Main Account. You can also try connecting to AOL using a different local access number.
Macintosh users
In addition to the above...
Make sure the "quit other applications" option is unchecked in the startup option menu. To view the startup options hold down the option key while you double click on the games application icon from your hard drive. Then make sure the "quit other applications" option is unchecked and click continue.
If you continue to have problems connecting, quit the game and delete the games preferences file.
If this error happens at irregular intervals, Battle.net may be down for maintenance - please try again later. Otherwise, please try the following steps in the order they appear. If step 1 does not help, proceed to step 2 and so forth:
Return to the main support menu, select the product you are using then check the patch information to make sure you have the latest version installed.
If you use a modem to dial up to your Internet Service Provider (ISP), ask your ISP for an alternate phone number to try.
Open the folder where you installed the game and find the bncache.dat file. Select this file and push the 'F2' key to rename it. Rename bncache.dat to bncache.old and push the 'enter' key.
If this fixed the problem please email the bncache.old file to Blizzard Technical Support (
http://www.blizzard.com/support/information/contact_info.shtml), along with information on the problem you were having.
Checking your Internet connection:
Bandwidth Speed Test: If you are still having problem you may want to check your current connections available bandwidth at (
http://msn.zdnet.com/partners/msn/bandwidth/speedtest500.htm).
Internet Traffic Report: The Internet Traffic Report (
http://www.internettrafficreport.com/) monitors the flow of data around the world. You may want to visit this web site to get an idea about the reliability of your region's connections.
If the Internet connection information shows you have a connection below what you think your modem, and ISP should be connecting at, please contact your ISP to see if there are any problems with their service.
