GlobalProtect: Two-Factor Authentication Using OTPs 
    This chapter provides information about two-factor authentication usinf OTPs to
        authenticate to gp portals and gateways.
    Secure your remote access environment against credential theft by implementing robust
                    
two-factor authentication (2FA) using One-Time
                    Passwords (OTPs). This essential security feature requires users
                requesting access to enter a unique OTP token sent from the authentication service
                to their RSA device. Implement this 2FA mechanism across your GlobalProtect® portals
                and gateways to ensure comprehensive protection
By default, the app reuses the same credentials used to log in to the portal and
                gateway. In the case of OTP authentication, this behavior causes the authentication
                to initially fail on the gateway. The resulting delay in prompting the user for a
                login often leads to the time-sensitive OTP expiring before it can be entered. To
                prevent this, you must configure the portals and gateways that prompt for the OTP
                instead of using the same credentials on a per-app configuration basis.