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Why C and D are correct (bridged traffic):

“In AOS 10 deployments that use mobility gateways, application/flow visibility and Client Insights for wireless clients are derived from gateway DPI and firewall session state. When an SSID is bridged at the AP (including mixed mode where a client is bridged), client data traffic does not traverse the gateway. Because the gateway does not see the user flows, flow attributes and network activity are not populated in Central for those clients.”

This applies to:

• C – SSID is bridged (all clients bypass the gateway).

• D – SSID is mixed mode but the affected clients are bridged (those clients bypass the gateway).

Why A, B, and E are not the best answers:

“When clients are tunneled (including mixed-mode clients that are tunneled) to the gateway, the gateway’s stateful firewall and DPI engine observe the sessions and export flow/app data to Central.”

Thus A is not a reason for missing data.

“Client VLANs marked untrusted are evaluated by the gateway firewall/DPI and support visibility. Marking a VLAN trusted bypasses firewall enforcement, but flow visibility for tunneled WLAN clients is based on gateway DPI; the primary reason Central shows no flow attributes is that the traffic never reached the gateway (bridged path).”

Therefore B/E are not the primary causes of this symptom in the scenario described.

References of HPE Aruba Networking Switching documents or Study Guide:

Aruba AOS 10 Gateway and WLAN Configuration Guides — “Tunneled vs Bridged SSIDs and impact on gateway DPI/visibility.”

Aruba Central Operations Guide — “Client Insights data sources from mobility gateways.”

Aruba Policy Enforcement and Application Visibility — “Gateway DPI and stateful firewall as the source for app/flow telemetry for wireless clients.”

In HPE Aruba ClearPass Guest configuration, the “Address” field defines the Fully Qualified Domain Name (FQDN) of the captive portal server that users are redirected to when accessing the guest network.

When a wildcard certificate is used, such as *.aruba-training.com, the derived FQDN for the captive portal redirection automatically becomes:

captiveportal-login.aruba-training.com

This naming convention is required so that the Common Name (CN) or Subject Alternative Name (SAN) in the SSL certificate matches the domain presented to the client browser during HTTPS redirection.

If the “Address” field is incorrectly configured with just aruba-training.com, the certificate and the redirection URL will not match, causing the browser to block or fail the authentication process. This results in users being unable to browse after pressing Connect on the portal page.

HPE Aruba documentation states:

“When using a wildcard certificate (for example CN = *.domain.com) on ClearPass Guest, the web login redirection address must be configured as captiveportal-login.domain.com to ensure the HTTPS certificate name matches the redirection hostname.”

“If the address field does not match the derived hostname of the certificate, browser trust validation fails and users cannot proceed beyond the captive portal page.”

Additionally, the ArubaOS and ClearPass Guest deployment guide clarifies that wildcard certificates are fully supported for guest portals, provided that the Address field follows the proper naming pattern.

Incorrect Configurations:

Setting “Address” to aruba-training.com causes SSL mismatch errors.

Leaving the “Address” blank defaults to a local IP or hostname mismatch.

Correct Configuration:

“Address” should be set to captiveportal-login.aruba-training.com when the wildcard certificate is *.aruba-training.com.

Option Explanations:

A. Incorrect – this does not follow the certificate’s derived FQDN format.

B. Correct – matches the expected derived FQDN for wildcard certificates.

C. Incorrect – HTTPS certificates are required for secure guest portals.

D. Incorrect – Wildcard certificates are supported by ClearPass Guest and ArubaOS.

Final Verified Answer: B

Reference Sources (HPE Aruba Networking Official Materials):

Aruba ClearPass Guest Configuration and Deployment Guide

ArubaOS 8.x User Guide – Captive Portal and Authentication Configuration

HPE Aruba ClearPass Certificates 101 Technical Note

ArubaOS-Switch and ClearPass Integration Guide

If some users are unable to connect to an SSID configured with WPA3-Enterprise GCM-256, and the "MAC Authentication Fall-Through" is disabled, it means that devices which fail 802.1X authentication will not attempt MAC authentication. If these client devices are configured to use MAC authentication as a backup method, they will fail to connect, explaining the issue faced by some users.