(Nov-2023) Latest HPE6-A84 Dumps for Success in Actual HP Certified [Q23-Q37]

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(Nov-2023) Latest HPE6-A84 Dumps for Success in Actual HP Certified

Changing the Concept of HPE6-A84 Exam Preparation 2023

HP HPE6-A84 (Aruba Certified Network Security Expert Written) Certification Exam is designed to assess the expertise of network security professionals in the Aruba technology stack. Aruba Certified Network Security Expert Written Exam certification validates the ability of candidates to design, implement, and manage secure networks using Aruba products and technologies. HPE6-A84 exam is intended for network security professionals who have experience with Aruba technologies and who want to advance their careers in the field.

HP HPE6-A84 is an Aruba Certified Network Security Expert Written exam that is designed to evaluate the knowledge and skills of the candidates in the field of network security. Aruba Certified Network Security Expert Written Exam certification is offered by Aruba, a Hewlett Packard Enterprise company, and is intended for individuals who want to prove their expertise in networking security with Aruba products.

QUESTION 23
Refer to the exhibit.

A customer requires protection against ARP poisoning in VLAN 4. Below are listed all settings for VLAN 4 and the VLAN 4 associated physical interfaces on the AOS-CX access layer switch:

What is one issue with this configuration?

ARP proxy is not enabled on VLAN 4.

LAG 1 is configured as trusted for ARP inspection but should be untrusted.

DHCP snooping is not enabled on VLAN 4.

Edge ports are not configured as untrusted for ARP inspection.

Explanation
This is because ARP inspection is a security feature that validates ARP packets in a network and prevents ARP poisoning attacks12 ARP inspection works by intercepting, logging, and discarding ARP packets with invalid IP-to-MAC address bindings1 To enable ARP inspection, the switch needs to know which ports are trusted and which are untrusted. Trusted ports are those that connect to authorized DHCP servers or other network devices that are not vulnerable to ARP spoofing. Untrusted ports are those that connect to end hosts or devices that might send forged ARP packets13 In the exhibit, LAG 1 is configured as a trusted port for ARP inspection, which is correct because it connects to the core switch. However, the edge ports (1/1/1-1/1/24) are not configured as untrusted ports for ARP inspection, which is incorrect because they connect to end hosts that might be compromised by an attacker. By default, all ports are untrusted for ARP inspection, but this can be changed by using the command ip arp inspection trust on the interface configuration mode3 Therefore, to protect VLAN 4 against ARP poisoning, the edge ports should be configured as untrusted for ARP inspection by using the command no ip arp inspection trust on the interface configuration mode. This way, the switch will validate the ARP packets received on these ports against the DHCP snooping database or an ARP access-list and drop any invalid packets34
A: ARP proxy is not enabled on VLAN 4. This is not an issue because ARP proxy is an optional feature that allows the switch to respond to ARP requests on behalf of hosts in different subnets5 It is not related to ARP poisoning or ARP inspection.
B: LAG 1 is configured as trusted for ARP inspection but should be untrusted. This is not an issue because LAG 1 connects to the core switch, which is a trusted device that does not send forged ARP packets.
C: DHCP snooping is not enabled on VLAN 4. This is not an issue because DHCP snooping is a separate feature that prevents rogue DHCP servers from offering IP addresses to clients6 It is not directly related to ARP poisoning or ARP inspection, although it can provide information for ARP inspection validation if enabled

QUESTION 24
Refer to the scenario.
A customer is using an AOS 10 architecture with Aruba APs and Aruba gateways (two per site). Admins have implemented auto-site clustering for gateways with the default gateway mode disabled. WLANs use tunneled mode to the gateways.
The WLAN security is WPA3-Enterprise with authentication to an Aruba ClearPass Policy Manager (CPPM) cluster VIP. RADIUS communications use RADIUS, not RadSec.
CPPM is using the service shown in the exhibits.

Which step can you take to improve operations during a possible gateway failover event?

Chanqe the WLANs to mixed-mode forwardinq so that vou can select multiple qatewav clusters.

Set up qatewav clusters manually and set VRRP IP addresses for dynamic authorization.

Use auto-group clustering instead of auto-site clustering for the gateways.

Enable default gateway mode for the gateway clusters.

QUESTION 25
You are configuring gateway IDS/IPS settings in Aruba Central.
For which reason would you set the Fail Strategy to Bypass?

To permit traffic if the IPS engine falls to inspect It

To enable the gateway to honor the allowlist settings configured in IDS/IPS policies

To tell gateways to stop enforcing IDS/IPS policies if they lose connectivity to the Internet

To avoid wasting IPS engine resources on filtering traffic for unauthenticated clients

QUESTION 26
A company has Aruba gateways and wants to start implementing gateway IDS/IPS. The customer has selected Block for the Fail Strategy.
What might you recommend to help minimize unexpected outages caused by using this particular fall strategy?

Configuring a relatively high threshold for the gateway threat count alerts

Making sure that the gateways have formed a cluster and operate in default gateway mode

Setting the IDS or IPS policy to the least restrictive option, Lenient

Enabling alerts and email notifications for events related to gateway IPS engine utilization and errors

QUESTION 27
A customer has an AOS 10-based mobility solution, which authenticates clients to Aruba ClearPass Policy Manager (CPPM). The customer has some wireless devices that support WPA2 in personal mode only.
How can you meet these devices’ needs but improve security?

Use MPSK on the WLAN to which the devices connect.

Configure WIDS policies that apply extra monitoring to these particular devices.

Connect these devices to the same WLAN to which 802.1X-capable clients connect, using MAC-Auth fallback.

Enable dynamic authorization (RFC 3576) in the AAA profile for the devices.

QUESTION 28
Refer to the exhibit.

You have been given this certificate to install on a ClearPass server for the RADIUS/EAP and RadSec usages.
What is one issue?

The certificate has a wildcard in the subject common name.

The certificate uses a fully qualified the ‘.local” domain name.

The certificate does not have a URI subject alternative name

The certificate does not have an IP subject alternative name

QUESTION 29
Refer to the scenario.
A customer has an Aruba ClearPass cluster. The customer has AOS-CX switches that implement 802.1X authentication to ClearPass Policy Manager (CPPM).
Switches are using local port-access policies.
The customer wants to start tunneling wired clients that pass user authentication only to an Aruba gateway cluster. The gateway cluster should assign these clients to the “eth-internet” role. The gateway should also handle assigning clients to their VLAN, which is VLAN 20.
The plan for the enforcement policy and profiles is shown below:

The gateway cluster has two gateways with these IP addresses:
* Gateway 1
o VLAN 4085 (system IP) = 10.20.4.21
o VLAN 20 (users) = 10.20.20.1
o VLAN 4094 (WAN) = 198.51.100.14
* Gateway 2
o VLAN 4085 (system IP) = 10.20.4.22
o VLAN 20 (users) = 10.20.20.2
o VLAN 4094 (WAN) = 198.51.100.12
* VRRP on VLAN 20 = 10.20.20.254
The customer requires high availability for the tunnels between the switches and the gateway cluster. If one gateway falls, the other gateway should take over its tunnels. Also, the switch should be able to discover the gateway cluster regardless of whether one of the gateways is in the cluster.
Assume that you have configured the correct UBT zone and port-access role settings. However, the solution is not working.
What else should you make sure to do?

Assign VLAN 20 as the access VLAN on any edge ports to which tunneled clients might connect.

Create a new VLAN on the AOS-CX switch and configure that VLAN as the UBT client VLAN.

Assign sufficient VIA licenses to the gateways based on the number of wired clients that will connect.

Change the port-access auth-mode mode to client-mode on any edge ports to which tunneled clients might connect.

Explanation
The correct answer is B. Create a new VLAN on the AOS-CX switch and configure that VLAN as the UBT client VLAN.
User-based tunneling (UBT) is a feature that allows the AOS-CX switches to tunnel the traffic from wired clients to a mobility gateway cluster, where they can be assigned a role and a VLAN based on their authentication and authorization 1. To enable UBT, the switches need to have a UBT zone configured with the IP addresses of the gateways, and a UBT client VLAN configured with the ubt-client-vlan command 2.
The UBT client VLAN is a special VLAN that is used to encapsulate the traffic from the tunneled clients before sending it to the gateways. The UBT client VLAN must be different from any other VLANs used on the switch or the network, and it must not be assigned to any ports or interfaces on the switch 2. The UBT client VLAN is only used internally by the switch for UBT, and it is not visible to the clients or the gateways.
In this scenario, the customer wants to tunnel the clients that pass user authentication to the gateway cluster, where they will be assigned to VLAN 20. Therefore, the switch must have a UBT client VLAN configured that is different from VLAN 20 or any other VLANs on the network. For example, the switch can use VLAN
4000 as the UBT client VLAN, as shown in one of the web search results 3. The switch must also have a UBT zone configured with the system IP addresses of the gateways as the primary and backup controllers, as explained in question 3.
The other options are not correct or relevant for this issue:
Option A is not correct because assigning VLAN 20 as the access VLAN on any edge ports to which tunneled clients might connect would conflict with UBT. The access VLAN is the VLAN that is assigned to untagged traffic on a port, and it is used for local switching on the switch 4. If VLAN 20 is assigned as the access VLAN, then the traffic from the clients will not be tunneled to the gateways, but rather switched locally on VLAN 20. This would defeat the purpose of UBT and cause inconsistency in role and VLAN assignment.
Option C is not correct because VIA licenses are not required for UBT. VIA licenses are required for enabling VPN services on Aruba Mobility Controllers for remote access clients using Aruba Virtual Intranet Access (VIA) software . VIA licenses are not related to UBT or wired clients.
Option D is not correct because changing the port-access auth-mode mode to client-mode on any edge ports to which tunneled clients might connect would not affect UBT. The port-access auth-mode mode determines how a port handles authentication requests from multiple clients connected to a single port .
Client-mode is the default mode that allows only one client per port, while multi-client-mode allows multiple clients per port. The port-access auth-mode mode does not affect how UBT works or how traffic is tunneled from a port.

QUESTION 30
Refer to the scenario.
An organization wants the AOS-CX switch to trigger an alert if its RADIUS server (cp.acnsxtest.local) rejects an unusual number of client authentication requests per hour. After some discussions with other Aruba admins, you are still not sure how many rejections are usual or unusual. You expect that the value could be different on each switch.
You are helping the developer understand how to develop an NAE script for this use case.
The developer explains that they plan to define the rule with logic like this:
monitor > value
However, the developer asks you what value to include.
What should you recommend?

Checking one of the access switches’ RADIUS statistics and adding 10 to the number listed for rejects

Defining a baseline and referring to it for the value

Using 10 (per hour) as a good starting point for the value

Defining a parameter and referring to it (self ^ramsfname]) for the value

Explanation
This is because a parameter is a variable that can be defined and modified by the user or the script, and can be used to customize the behavior and output of the NAE script. A parameter can be referred to by using the syntax self ^ramsfname], where ramsfname is the name of the parameter.
By defining a parameter for the value, the developer can make the NAE script more flexible and adaptable to different scenarios and switches. The parameter can be set to a default value, such as 10, but it can also be changed by the user or the script based on the network conditions and requirements. For example, the parameter can be adjusted dynamically based on the average or standard deviation of the number of rejects per hour, or based on the feedback from the user or other admins. This way, the NAE script can trigger an alert only when the number of rejects is truly unusual and not just arbitrary.
A: Checking one of the access switches’ RADIUS statistics and adding 10 to the number listed for rejects. This is not a good recommendation because it does not account for the variability and diversity of the network environment and switches. The number of rejects listed for one switch might not be representative or relevant for another switch, as different switches might have different traffic patterns, client types, RADIUS configurations, etc. Moreover, adding 10 to the number of rejects is an arbitrary and fixed value that might not reflect the actual threshold for triggering an alert.
B: Defining a baseline and referring to it for the value. This is not a bad recommendation, but it is not as good as defining a parameter. A baseline is a reference point that represents the normal or expected state of a network metric or performance indicator. A baseline can be used to compare and contrast the current network situation and detect any anomalies or deviations. However, a baseline might not be easy or accurate to define, as it might require historical data, statistical analysis, or expert judgment. Moreover, a baseline might not be stable or constant, as it might change over time due to network growth, evolution, or optimization.
C: Using 10 (per hour) as a good starting point for the value. This is not a good recommendation because it is an arbitrary and fixed value that might not reflect the actual threshold for triggering an alert. Using 10 (per hour) as the value might result in false positives or false negatives, depending on the network conditions and switches. For example, if the normal number of rejects per hour is 5, then using 10 as the value might trigger an alert too frequently and unnecessarily. On the other hand, if the normal number of rejects per hour is 15, then using 10 as the value might miss some important alerts and risks.

QUESTION 31
You are reviewing an endpoint entry in ClearPass Policy Manager (CPPM) Endpoints Repository.
What is a good sign that someone has been trying to gain unauthorized access to the network?

The entry shows multiple DHCP options under the fingerprints.

The entry shows an Unknown status.

The entry shows a profile conflict of having a new profile of Computer for a profiled Printer.

The entry lacks a hostname or includes a hostname with long seemingly random characters.

QUESTION 32
What is a common characteristic of a beacon between a compromised device and a command and control server?

Use of IPv6 addressing instead of IPv4 addressing

Lack of encryption

Use of less common protocols such as SNAP

Periodic transmission of small, identically sized packets

QUESTION 33
Refer to the scenario.
An organization wants the AOS-CX switch to trigger an alert if its RADIUS server (cp.acnsxtest.local) rejects an unusual number of client authentication requests per hour. After some discussions with other Aruba admins, you are still not sure how many rejections are usual or unusual. You expect that the value could be different on each switch.
You are helping the developer understand how to develop an NAE script for this use case.
You are helping a customer define an NAE script for AOS-CX switches. The script will monitor statistics from a RADIUS server defined on the switch. You want to future proof the script by enabling admins to select a different hostname or IP address for the monitored RADIUS server when they create an agent from the script.
What should you recommend?

Use this variable, %{radius-ipV when defining the monitor URI in the NAE agent script.

Define a parameter for the RADIUS server; reference that parameter instead of the server name/ip when defining the monitor URI.

Use a callback action to collect the name of any RADIUS servers defined on the switch at the time the agent is created.

Make the script editable so that admins can edit it on demand when they are creating scripts.

Explanation
This is because a parameter is a variable that can be defined and modified by the user or the script, and can be used to customize the behavior and output of the NAE script. A parameter can be referred to by using the syntax self ^ramsfname], where ramsfname is the name of the parameter.
By defining a parameter for the RADIUS server, you can make the NAE script more flexible and adaptable to different scenarios and switches. The parameter can be set to a default value, such as cp.acnsxtest.local, but it can also be changed by the user or the script based on the network conditions and requirements. For example, the user can select a different hostname or IP address for the monitored RADIUS server when they create an agent from the script, or the script can automatically detect and update the parameter based on the switch configuration. This way, the NAE script can monitor statistics from any RADIUS server defined on the switch without hard-coding the server name or IP address in the monitor URI.
A: Use this variable, %{radius-ipV when defining the monitor URI in the NAE agent script. This is not a valid recommendation because %{radius-ipV is not a valid variable in NAE scripts. Variables in NAE scripts are prefixed with self ^ramsfname], not with %. Moreover, radius-ipV is not a predefined variable that contains the RADIUS server name or IP address, but rather a generic term that could refer to any IP version.
C: Use a callback action to collect the name of any RADIUS servers defined on the switch at the time the agent is created. This is not a bad recommendation, but it is not as good as defining a parameter. A callback action is a feature that allows an NAE script to execute a command on the switch and collect its output for further processing or display. A callback action can be used to collect the name of any RADIUS servers defined on the switch by executing a command such as show radius-server or show running-config radius-server and parsing its output. However, a callback action might not be as fast or reliable as using a parameter, as it depends on the availability and responsiveness of the switch and its CLI.
D: Make the script editable so that admins can edit it on demand when they are creating scripts. This is not a good recommendation because making the script editable exposes it to potential errors or modifications that could affect its functionality or performance. Making the script editable also requires more effort and expertise from the admins, who might not be familiar with NAE scripting syntax or logic. Moreover, making the script editable does not future proof it, as it does not allow for dynamic changes or updates based on network conditions or requirements.

QUESTION 34
You are designing an Aruba ClearPass Policy Manager (CPPM) solution for a customer. You learn that the customer has a Palo Alto firewall that filters traffic between clients in the campus and the data center.
Which integration can you suggest?

Sending Syslogs from the firewall to CPPM to signal CPPM to change the authentication status for misbehaving clients

Importing clients’ MAC addresses to configure known clients for MAC authentication more quickly

Establishing a double layer of authentication at both the campus edge and the data center DMZ

Importing the firewall’s rules to program downloadable user roles for AOS-CX switches more quickly

QUESTION 35
Refer to the scenario.
A customer requires these rights for clients in the “medical-mobile” AOS firewall role on Aruba Mobility Controllers (MCs):
Permitted to receive IP addresses with DHCP
Permitted access to DNS services from 10.8.9.7 and no other server
Permitted access to all subnets in the 10.1.0.0/16 range except denied access to 10.1.12.0/22 Denied access to other 10.0.0.0/8 subnets Permitted access to the Internet Denied access to the WLAN for a period of time if they send any SSH traffic Denied access to the WLAN for a period of time if they send any Telnet traffic Denied access to all high-risk websites External devices should not be permitted to initiate sessions with “medical-mobile” clients, only send return traffic.
The line below shows the effective configuration for the role.

There are multiple issues with this configuration. What is one change you must make to meet the scenario requirements? (In the options, rules in a policy are referenced from top to bottom. For example,
“medical-mobile” rule 1 is “ipv4 any any svc-dhcp permit,” and rule 6 is “ipv4 any any any permit’.)

Apply the “apprf-medical-mobile-sjcT policy explicitly to the ‘medical-mobile’ user-role under the
‘medical-mobile” policy.

In the “medical-mobile” policy, change the action for rules 2 and 3 to reject.

In the “medical-mobile” policy, move rule 5 under rule 6.

In the “medical-mobile* policy, change the subnet mask in rule 5 to 255.255.252.0.

QUESTION 36
Refer to the scenario.
A customer has an AOS10 architecture that is managed by Aruba Central. Aruba infrastructure devices authenticate clients to an Aruba ClearPass cluster.
In Aruba Central, you are examining network traffic flows on a wireless IoT device that is categorized as
“Raspberry Pi” clients. You see SSH traffic. You then check several more wireless IoT clients and see that they are sending SSH also.
You want an easy way to communicate the information that an IoT client has used SSH to Aruba ClearPass Policy Manager (CPPM).
What step should you take?

On CPPM create an Endpoint Context Server that points to the Central API.

On CPPM enable Device Insight integration.

On Central configure APs and gateways to use CPPM as the RADIUS accounting server.

On Central set up CPPM as a Webhook application.

QUESTION 37
When would you implement BPDU protection on an AOS-CX switch port versus BPDU filtering?

Use BPDU protection on edge ports to protect against rogue devices when the switch implements MSTP; use BPDU filtering to protect against rogue devices when the switch implements PVSTP+.

Use BPDU protection on edge ports to prevent rogue devices from connecting; use BPDU filtering on inter-switch ports for specialized use cases.

Use BPDU protection on inter-switch ports to ensure that they are selected as root; use BPDU filtering on edge ports to prevent rogue devices from connecting.

Use BPDU protection on edge ports to permanently lock out rogue devices; use BPDU filtering on edge ports to temporarily lock out rogue devices.

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