Require : OpenVPN With A One Time Password (OTP)

[drsaluml]

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

[pashcovich]

method by the link you sent is not applicable for our soft because it uses PAM, but we have our own WIP implementation that allows you to use OTP INSTEAD of a password when connecting. see #222