How to install OpenVPN with 2-facor authentication

Question

I've installed OpenVPN over Ubuntu 16.4.2 and I'm trying to add 2 factor authentication using Google Authenticator.
Does someone got a manual or some kind of a user guide how to do that ?

Thanks ,

Shimon.

Shimi · Answer

After creating a fully functional VPN server I continued the configuration using this manual :

https://www.howtoforge.com/securing-openvpn-with-a-one-time-password-otp-on-ubuntu

One important thing that is not mentioned in the manual: 
to every user that is going to use this VPN a user account with a specific folder must be created.
The Google-Authenticator store the credentials on the user home folder.

How to install OpenVPN with 2-facor authentication

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