Duo provides a two-factor authentication integration for the OpenVPN Community Open Source Software Project that is easy to deploy, use, and manage. This demonstration video shows how to set up our OpenVPN integration in just a few minutes. For additional information on this integration visit our OpenVPN documentation at https://duo.com/docs/openvpn.
Note that Duo also provides an integration for OpenVPN Access Server. You can read about that configuration at https://duo.com/docs/openvpn_as.