Aruba ClearPass can integrate with third-party security and IT systems through ClearPass Exchange. A common integration with next-generation firewalls like Palo Alto is to use the firewall's threat intelligence to trigger network access enforcement. When the Palo Alto firewall detects malicious activity or a policy violation from a specific client IP address, it can send a Syslog message to ClearPass. ClearPass can then parse this message and initiate a Change of Authorization (CoA) to modify the client's access, such as moving them to a quarantine VLAN or disconnecting them from the network entirely. This creates a dynamic, automated threat response system.

B: A firewall is not the authoritative source for a list of known client MAC addresses; this information is typically imported from an asset database or MDM.

C: This describes a network security architecture (defense-in-depth) rather than a specific, direct technical integration between the ClearPass and firewall platforms.

D: Firewall rules and switch downloadable user roles are distinct constructs. You cannot directly import firewall rules to create switch roles; they serve different purposes at different network layers.

1. Aruba ClearPass & Palo Alto Networks Firewall Integration Guide: This guide details the integration process. It states

"The integration between ClearPass and Palo Alto Networks (PAN) Next-Generation Firewalls (NGFWs) provides a comprehensive NAC and security solution... PAN-OS can send syslog messages to ClearPass when a threat is detected. ClearPass can then take an action on the endpoint that is the source of the threat." (See "Solution Overview" and "Threat-Based Enforcement Workflow" sections).

2. ClearPass Policy Manager 6.11 User Guide: This document describes how ClearPass can act as a Syslog server to receive messages from external devices and trigger enforcement. "ClearPass can be configured as a syslog server to receive messages from network devices... Based on the content of the syslog message

ClearPass can change the state of the endpoint in the Endpoint Repository and initiate a Change of Authorization (CoA)." (See Chapter: "Configuration > Enforcement > Profiles"

Section: "Syslog Export Enforcement Profile").