ZyXEL Communications SBG3500-N000 - Configuring L2 TP VPN on Windows 7

Chapter 4 Tutorials
SBG3500-N Series User’s Guide
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2 In the Services window, scroll down to find IPsec Policy Agent. Make sure the status is Started.
If not, click Start the service in the left panel.
4.15.4 Configuring L2TP VPN on Windows 7
In Windows 7 do the following to establish an L2TP VPN connection.