KnowledgeBase : HOWTO's
How to Configure GajShield Two Factor Authentication
To enable Two-factor authentication, login into your firewall using your regular username and password. If you have not setup 2FA, you can ignore the OTP option. 2FAcan be setup by 'superuser' for all administrators or for an individual administrator.
Click on Management - Administration - OTP Configuration. Edit the configuration of the administrator for whom you would like to configure OTP.
Supported APPs for OTP:
Windows Store: Authenticator
For further configuration details, click on below link.