HPE7-A02 Exam Dumps - HP ACNSP Questions and Answers

To capture only the traffic sent in the mirroring session between an AOS-CX switch and a management station running Wireshark, you should apply a capture filter that isolates the specific traffic of interest. In this case, using the filter udp port 5555 will capture the traffic associated with the mirroring session. This is because AOS-CX switches typically use UDP port 5555 for mirrored traffic, ensuring that only the relevant mirrored packets are captured and excluding other traffic generated by the management station.

Rogue AP Containment Methods:

HPE Aruba Networking recommends using wireless deauthentication as the preferred method for rogue AP containment.

Deauthentication sends deauth frames to clients connected to rogue APs, causing them to disconnect. This method is effective without introducing unnecessary disruptions to the wired infrastructure.

Key Points:

Wireless Deauthentication is simple, efficient, and widely supported across client devices.

Tarpit Containment is more aggressive and may cause unintentional disruptions to legitimate clients.

Wired Containment involves blocking traffic at the switch level but is complex and may impact legitimate infrastructure traffic.

Option Analysis:

Option A: Correct. Wireless deauthentication is the recommended method as it targets rogue AP clients without excessive network impact.

Option B: Incorrect. Combining wireless tarpit and wired containment is overkill and not typically recommended.

Option C: Incorrect. Wireless tarpit can be effective but is generally not the first choice due to its aggressive nature.

Option D: Incorrect. Wired containment is more complex and reserved for specific use cases, not general recommendations.

Tag Updates Action - "Apply for All Tag Updates":

This setting ensures that all updated tags from Device Insight (CPDI) are applied dynamically.

It is particularly useful when you want to trigger Change of Authorization (CoA) without explicitly predefining the tag values.

Option D: Correct. This setting allows CPPM to issue CoAs automatically for updated tags without requiring prior configuration of specific tags.

Option A: Incorrect. The setting is not directly related to reducing the poll interval latency.

Option B: Incorrect. Disconnecting devices based on dangerous tags would require predefined enforcement rules.

Option C: Incorrect. Posture information updates do not directly rely on this setting.

1. The Need for Faster Threat Notifications

Admins need immediate alerts when threats are detected by the gateway's IDS/IPS functionality. Regularly checking the Security Dashboard is inefficient, so an automated notification system is essential for faster response times.

2. Explanation of Each Option

A. Set up Webhooks that are attached to the HPE Aruba Networking Central Threat Dashboard:

Incorrect:

Webhooks are useful for integrating alerts with third-party tools or custom workflows. However, setting up email notifications through global alert settings is faster and simpler for this purpose.

B. Use Syslog to integrate the gateways with HPE Aruba Networking ClearPass Policy Manager (CPPM) event processing:

Incorrect:

Syslog integration with CPPM is typically used for logging and correlating events, not for real-time notifications about threats.

CPPM is better suited for policy enforcement, not instant threat alerts.

C. Set up email notifications using HPE Aruba Networking Central's global alert settings:

Correct:

HPE Aruba Networking Central has global alert settings that allow admins to configure email notifications for specific events, such as threat detection.

This is the simplest and most effective way to ensure admins receive immediate notifications when threats are detected by the gateways.

D. Integrate HPE Aruba Networking ClearPass Device Insight (CPDI) with Central and schedule hourly reports:

Incorrect:

While CPDI integration provides enhanced device profiling, it is not directly tied to gateway IDS/IPS threat detection.

Hourly reports are not real-time notifications and would not meet the requirement for faster threat alerts.

Final Recommendation

Setting up email notifications through HPE Aruba Networking Central's global alert settings provides the most direct and efficient solution for immediate threat detection alerts.

References

HPE Aruba Networking Central Alert Management Documentation.

Aruba IDS/IPS and Security Dashboard Configuration Guide.

Email Notification Setup for Aruba Central Threat Alerts.

When using "Tips

" conditions within an 802.1X service's enforcement policy, you should enable caching roles and posture attributes from previous sessions in the service's enforcement settings. This ensures that ClearPass retains posture information from previous authentications, which is necessary for making decisions based on the current posture state of an endpoint. By caching these attributes, ClearPass can apply appropriate enforcement actions based on the device's posture status.

On Aruba Mobility Controllers, dataplane captures can include wireless frames encapsulated inside GRE (for example, ERM / remote mirroring or tunneled 802.11 data). If Wireshark does not have GRE dissection enabled, these packets may appear as generic IP/UDP payloads, and the inner traffic (client frames) will not decode correctly.

MC dataplane is exactly where GRE-encapsulated user traffic is likely to appear. Enabling GRE in Wireshark allows you to see and decode the inner payload (802.11/Ethernet/IP).

MC control plane traffic is generally not GRE encapsulated data traffic.

For gateways, captures exported as ERM over UDP often require different decoding (e.g., ARUBA_ERM, not generic GRE).

Thus, the most appropriate case to ensure GRE is enabled is when the capture came from the MC dataplane → Option D.

When integrating ClearPass Policy Manager (CPPM) with ClearPass Device Insight (CPDI), it is important to understand how device profiling and classification work between the two solutions:

1. CPPM and CPDI Integration Overview

CPPM is primarily used for access control and policy enforcement, while CPDI specializes in device profiling and classification through advanced analytics and machine learning.

Integration allows CPPM to leverage CPDI's enhanced profiling capabilities for more accurate device identification and policy enforcement.

2. Detailed Analysis of Each Option

A. CPPM no longer supports any Device Profiler features and relies on CPDI for this profile information:

Incorrect: CPPM still supports its own basic device profiling features and can operate independently. However, when integrated with CPDI, CPPM can use CPDI’s advanced profiling capabilities as a supplement.

B. CPDI must be configured as an audit server on CPPM for the integration to be successful:

Incorrect: CPDI is not configured as an audit server on CPPM. Integration is achieved via API integration and communication between the two solutions, not through audit server settings.

C. CPDI must have security analysis disabled on it for the integration to be successful:

Incorrect: Security analysis does not need to be disabled for integration. In fact, CPDI’s security analysis enhances the classification process by identifying anomalous behaviors.

D. CPPM can submit profile information to CPDI, but if CPDI derives a different classification, CPDI takes precedence:

Correct:

CPPM and CPDI exchange profile data, but CPDI has more advanced device classification capabilities due to its machine learning-based engine.

When CPDI derives a different classification than CPPM, CPDI's classification is considered more accurate and takes precedence.

This ensures that policies are based on the most reliable device classification.

References

Aruba ClearPass Policy Manager and Device Insight Integration Guide.

ClearPass Device Profiling and Classification Documentation.

Best Practices for CPPM and CPDI Integration in Network Security.

To better interpret the packets shown in the Wireshark capture, you should choose to decode UDP port 5555 packets as ARUBA_ERM and set the Aruba ERM Type to 0. This configuration will allow Wireshark to properly decode and display the Aruba-specific encapsulated remote mirroring (ERM) packets, providing a clearer understanding of the traffic.

1.Decoding Protocols: Selecting the correct protocol decoding in Wireshark ensures that the captured packets are interpreted correctly, displaying the relevant information.

2.Aruba ERM: The packets in the capture are likely encapsulated remote mirroring (ERM) packets specific to Aruba, which require proper decoding settings in Wireshark.

3.Clear Interpretation: By setting the Aruba ERM Type to 0 and decoding the packets as ARUBA_ERM, you can view the encapsulated data accurately.

Aruba firewall / role access rules are evaluated top-down, first-match wins; once a rule matches, no later rules are processed.

Let’s walk the packet through the ordered rules:

The traffic is SSH, not UDP/67 ⇒ rule 1 does not match.

Destination 10.1.7.12 is not in 10.1.4.0/23 ⇒ rule 2 does not match.

10.1.7.12 is in 10.1.0.0/18 ⇒ rule 3 matches first.

Rule 3 action: Deny any to 10.1.0.0/18 + log.

Because rule 3 already matched, the later “Deny SSH to 10.1.0.0/21 + denylist” rule is never evaluated, so no denylist is applied.

Aruba documentation for session ACLs and firewall rules explicitly states that rules are evaluated from top to bottom and “the first match terminates further evaluation,” and logging/denylist flags on a rule are applied only when that specific rule matches.

So the outcome is: the SSH traffic is dropped and logged, but the client is not denylisted → Option B.

When configuring 802.1X authentication on edge ports of an AOS-CX switch and assigning VoIP phones to a "voice" role, the correct approach is to configure VLAN 12 as the allowed trunk VLAN in the "voice" role. This setup ensures that traffic tagged for VLAN 12 is appropriately managed by the role applied to the VoIP phones. In AOS-CX switches, the role-based VLAN configuration allows for more granular control and ensures that the VoIP phones' traffic is handled correctly without altering the edge port settings, which typically operate with default settings for authentication.