How to Enable Google Authenticator MFA for Access Server
OpenVPN Access Server supports the Google Authenticator MFA system, but it is not enabled by default. To enable it globally:
- Sign in to our Admin Web UI.
- Click Authentication > General (Access Server version 2.7.5 and newer) or Client Settings (Access Server version 2.7.4 and older).
- Enable Google Authenticator MFA, save and update your server.
Note: If you are using MFA added by post-auth script, enabling Google MFA will break user authentication. Ensure that no other MFA is enabled when enabling Google MFA.
See the full guide here: Google Authenticator multi-factor authentication