VPN Problems with Vista


Error 741: The local computer does not support the required data encryption type

Vista VPN Error

Vista VPN Error

I recently had this problem trying to connect to my work’s VPN connection, which I had previously connected to with no problems under XP.  Apparently this is due to the security standard in Vista being too high for our old school CHAP VPN connection- the fix;

  1. Right click the VPN connection and go to properties
  2. Click the security tab
  3. click the “Advanced (custom settings)” radio button, then click the settings button
  4. Select “Optional encryption” from the Data Encryption drop down
  5. Select the “Allow these protocols” radio button, and make sure “Challenge Handshake Authentication Protocol (CHAP)” is ticked, as well as “Microsoft CHAP Version 2 (MS-CHAP v2)
  6. hit ok, then ok in the parent window and connect!

Vista VPN Error - Fix

Vista VPN Error - Fix

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