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Error 691 when connecting through VPN on Windows 8 or Windows 10

After upgrading to Windows 8, I ran into an issue where I couldn’t VPN into my old Windows Server 2003 machine anymore. I kept getting this error:

Error: 691: The remote connection was denied because the user name and password combination you provided is not recognized, or the selected authentication protocol you selected is not permitted on the remote access server.

I know that my username and password is correct so I figured it must be something else. Turns out, it’s an easy fix.

  1. Open your VPN connections properties.
  2. Go to the security tab
  3. Check “Allow these protocols” and make sure “Microsoft CHAP Version 2” is checked

    Select the radio button for “Allow these protocols”

  4. That’s it

I’m guess this is a bug of some sort. Once you select one of the two radio buttons, you can’t deselect them which leads me to believe that it is a bug. Hopefully this will be fixed in an upcoming Windows update.

Tags: windows 8windows server 2003
Keith Slater:

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