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Palo Alto Networks firewalls can map IP addresses to usernames using various methods, such as User-ID agents, Captive Portal, GlobalProtect, XML API, and HTTP headers. These methods allow the firewall to enforce security policies based on user identity, rather than just IP address. Some of these methods are:

Using the XML API: The XML API allows external systems to send user mapping information to the firewall using HTTPS requests. The firewall can then use this information to identify the users behind the IP addresses and apply the appropriate policies1.

A user connecting into a GlobalProtect gateway using a GlobalProtect Agent: GlobalProtect provides secure remote access to the network by establishing a VPN tunnel between the user’s device and the firewall. When a user connects to a GlobalProtect gateway using a GlobalProtect agent, the firewall can authenticate the user and map the user’s IP address to the username1.

Usernames inserted inside HTTP Headers: The firewall can also extract usernames from HTTP headers in web traffic. This method requires the web server or proxy server to insert the username into a custom HTTP header that the firewall can read. The firewall can then use this information to map the IP address to the username1.

References: Map IP Addresses to Users, Certifications - Palo Alto Networks, Palo Alto Networks Certified Network Security Administrator (PAN-OS 10.0) or Palo Alto Networks Certified Network Security Administrator (PAN-OS 10.0).

Explanation

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Explanation/Reference:

When grouping rules by group tags, the action that can be performed is to tag selected rule(s). This action allows you to assign one or more tags to the selected rules, which will group them together and display them under the corresponding tag group. You can use tags to organize and visually distinguish your rules based on different criteria, such as function, location, or priority1. References: View Rules by Tag Group, Use Tags to Group and Visually Distinguish Objects, Certifications - Palo Alto Networks, Palo Alto Networks Certified Network Security Administrator (PAN-OS 10.0) or [Palo Alto Networks Certified Network Security Administrator (PAN-OS 10.0)].