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Innovile
Error 3003 Why? Isnt this an old problem?(1)Category: Technical SupportJanuary-18-2013 2:53 PM PST (10 years ago) Go to Blizzard forum post
I get error 3003 when I try to log on. Any body have the same problem? Again?
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Lurdlespor
Error 3003 Why? Isnt this an old problem?(2)January-19-2013 7:35 AM PST (10 years ago) Go to Blizzard forum post
Hello,

Error 3003 is simply a communciation error, can you please try flushing the DNS cache, then see if that helps at all:

Power off your modem/router for 5 minutes, turn it back on and then perform this command.

Windows XP:
- Click Start and then Run
- Type cmd in the run box and click Ok
- In the Command Console window that has appeared type: ipconfig /flushdns
- After typing the above command, press Enter to execute it and then close the window

Windows Vista / 7:
- Click Start, then Programs, then Accessories and then locate 'Command Prompt'
- Right-click on 'Command Prompt' and left-click on 'Run as Administrator'
- In the Command Console window that has appeared type: ipconfig /flushdns
- After typing the above command, press Enter to execute it and then close the window

Mac /OS X:
battle.net/support/article/ip-release-renew-and-flush-dns-mac
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