Sometimes you install a VPN on your PC to protect your online privacy. Although the VPN software is great, you always encounter some connection issues, for example, VPN not connecting, VPN connection failed due to unsuccessful domain name, etc. Besides, there is another common issue you can run into and it is VPN error 789.
It is one of the most common errors that appear when attempting to connect to an L2TP server. In Windows 7/8, you get the following computer screen. You can see error 789 and the detailed information saying “The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer”.
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