Why can't my L2TP VPN connection connect from Windows to ATP/USG/NSG?

Zyxel_Chris Posts: 669  Zyxel Employee
First Anniversary 10 Comments Friend Collector First Answer
in VPN

Sometimes, due to Microsoft patches, even with the same VPN settings, connections may not be established. Please try the settings as shown in the following figure. If it still doesn't work, please uncheck "Microsoft CHAP Version 2" and check "Unencrypted password" instead.

The second thing you can check is to ensure that IKE has been activated in Windows services.