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For a network security administrator to authenticate and identify a user with a new BYOD-type device that is not joined to the corporate domain, the most effective method is to use an Authentication policy targeting users not yet identified by the system.

A. an Authentication policy with 'unknown' selected in the Source User field:

An Authentication policy allows the firewall to challenge unidentified users for credentials. By selecting 'unknown' in the Source User field, the policy targets users who have not yet been identified by the firewall, which would include users on new BYOD devices not joined to the domain.

Once the user provides valid credentials, the firewall can authenticate the user and map their identity to subsequent sessions, enabling the application of user-based policy rules and monitoring.

This approach ensures that new and unknown devices can be properly authenticated and identified without compromising security or requiring the device to be part of the corporate domain.

Hover over an attribute in the table below the chart and click the arrow icon to the right of the attribute. https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/monitoring/use-the-application-command-center/interact-with-the-acc#id5cc39dae-04cf-4936-9916-1a4b0f3179b9

https://docs.paloaltonetworks.com/pan-os/9-1/pan-os-admin/firewall-administration/manage-firewall-administrators/administrative-authentication#:~:text=The%20administrative%20accounts%20are%20defined,attributes%20on%20the%20SAML%20server .

The SSL Forward Proxy rule type is designed to control and inspect SSL traffic from internal users to external websites. When an internal user attempts to access an HTTPS site, the Palo Alto Networks firewall, acting as an SSL Forward Proxy, intercepts the SSL request. It then establishes an SSL connection with the requested website on behalf of the user. Simultaneously, the firewall establishes a separate SSL connection with the user. This setup allows the firewall to decrypt and inspect the traffic for threats and compliance with security policies before re-encrypting and forwarding the traffic to its destination.

This process is transparent to the end user and ensures that potentially harmful content delivered over encrypted SSL connections can be identified and blocked. SSL Forward Proxy is a critical component of a comprehensive security strategy, allowing organizations to enforce security policies and protect against threats in encrypted traffic.