This video discusses GlobalProtect Portal - Client Authentication and the importance of two-factor authentication.
With Client Authentication, the user presents a client certificate along with a connection request to the GlobalProtect Portal or Gateway. The portal or gateway can use either the shared or unique client certification to validate that the user or endpoint belongs to the organization. The GlobalProtect Portal Client Authentication best practice check ensures two-factor authentication is enabled for client authentication.
For more information about GlobalProtect Client Authentication, please review the following articles: