D-Link AC1900 - Windows 7

98D-Link DIR-878 User Manual
Section 5 - Quick VPN
Click the Start button and type vpn into the Search programs and les box.
Select 4FUVQBWJSUVBMQSJWBUFOFUXPSL71/DPOOFDUJPO
Enter the *1%%/4BEESFTT of your Quick VPN server in the Internet address
box, create a name for your connection in the Destination Name, check Don't
Connect now; just set it up so I can connect later, and click /FYU.
Windows 7
VPN Setup Instructions