HPE6-A88 Exam Dumps

ClearPass services are designed to be flexible with identity sources. In the Authentication tab of a service configuration, an administrator can add multiple sources (e.g., Active Directory, Guest Repository, and Local User Repository). ClearPass processes these sources in the exact order they appear in the list---attempting to authenticate the user against the first source, and moving to the next only if the user is not found in the previous one.

Comprehensive and Detailed Explanation From HPE Aruba Networking ClearPass portfolio:

OCSP (Online Certificate Status Protocol) is used to check if a certificate has been revoked. By default, most certificates contain an 'Authority Information Access' (AIA) field that points to the CA's OCSP responder. If the 'Override' option is unchecked, ClearPass follows standard PKI behavior and uses the specific URL embedded within the client's certificate to verify its status.

In a Pre-Authentication workflow (often used in Captive Portals), ClearPass first checks the user's credentials locally or against an external source before the actual NAD (switch/controller) sends the final RADIUS request. For this to work seamlessly, the same service or logic in ClearPass must be able to handle the initial check and the subsequent NAD request to ensure consistency in role assignment and session tracking.

Posture tokens are temporary and have a configurable expiry timer (often defaulted to 5 minutes). If a device disconnects and remains inactive for longer than this threshold, ClearPass clears the token to ensure it doesn't grant access based on potentially stale health data. When the device returns after 10 minutes, it must perform a new health check to regain its 'Healthy' status.

OCSP (Online Certificate Status Protocol) is designed to provide real-time revocation status. If an OCSP responder returns a status of 'unknown', it means the responder has no record of the certificate. From a security standpoint, ClearPass treats any response other than 'Good' as a failure. To prevent potential unauthorized access via certificates that the PKI cannot verify, ClearPass will reject the authentication attempt.