789: The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the remote computer
The first thing that should be done is reboot and test the VPN. If you still get error 789 then you can try the following:
Cause/solution: Your operating system is not correctly configured to connect to an L2TP server. The connection attempt is failing before a connection to the server is ever attempted. This error is caused entirely by a misconfiguration of the user's operating system. Location, or connect type has no bearing on receiving this error message.
Click on the Start & type services.msc in the search box and then right click on it when it appears in the list and select "run as administrator".(Vista / 7)
Click on the Start > Run > Type services.msc and press enter (XP)
Find:
Locate both: "IKE and AuthIP IPsec Keying Modules" and "IPsec Policy Agent"
-- In the "status" column it should state "started" Right click the service and click restart.
-- If it is not "started" Right click to start it.
-- Right click and click properties. For "startup type" choose "automatic" and save
-- Test the VPN connection.
-- Reboot and test the VPN connection.
What is a VPN?
VPN’s (Virtual Private Network’s) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).
Why do I need a VPN?
Whether you’re an expat living in a foreign country where the internet is heavily regulated, a mobile user constantly on the road, or just someone concerned with maintaining their privacy online, having a VPN is becoming essential.
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