Using Open VPN Desktop Client
Open the web-browser enter the following address https://ssl.vpn.directi.com/ or https://sslvpn.ops.directi.com
Now enter the username & password and select the login option in the drop down and click on go.
use  https://ssl.vpn.directi.com/ when you want all traffic to go via the VPN .
use https://sslvpn.ops.directi.com when you want only private network to be via VPN .

After login the web page
Download the file OpenVPN Connect for Windows.


Once you download connect client, scan the QR code from your smartphone or from browser plugin and click on I scanned the QR code option


Now install the opevpn-connect.msi, after installing you will see openvpn icon at taskbar.
Click on openvpn icon then you will see below mention image




 Click on connect option and put the server IP or host name after that u will get below interface.





Now login with your AD credentials.
After login it will give warning for VPN connection so click on Yes


After this it will ask for google authentication code
Put the 6 digit code which is generated on your smart phone or in browser plugin and click on continue