Authentication policy enables you to authenticate end
users before they can access services and applications. Whenever
a user requests a service or application (such as by visiting a
web page), the firewall evaluates Authentication policy. Based on
the matching Authentication policy rule, the firewall then prompts
the user to authenticate using one or more methods (factors), such
as login and password,
Voice, SMS, Push, or One-time Password (OTP)
authentication. For the first factor, users authenticate
through a Authentication Portal web form. For any additional factors,
users authenticate through a
Multi-Factor
Authentication (MFA) login page.