Why can't I enable 2FA for SSL VPN on USG FLEX H using Google Authenticator?

Zyxel_Emily

Question:
SSL VPN is working when selecting Nebula Cloud Authentication. Why can't I enable 2FA for SSL VPN on USG FLEX H using Google Authenticator?

Answer:
2FA is not supported when "Cloud Authentication" is selected as the Sign-on method for SSL VPN. If you select "Local users" for Sign-on, you can configure Google Authenticator for added security.

Refer to the handbook for step-by-step guidance:
Chapter 3- Authentication
How to Use Two Factor with Google Authenticator for Remote Access VPN and SSL VPN