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HPE6-A84 Exam Dumps - Aruba Certified Network Security Expert Written Exam

Question # 4

Refer to the scenario.

A customer is migrating from on-prem AD to Azure AD as its sole domain solution. The customer also manages both wired and wireless devices with Microsoft Endpoint Manager (Intune).

The customer wants to improve security for the network edge. You are helping the customer design a ClearPass deployment for this purpose. Aruba network devices will authenticate wireless and wired clients to an Aruba ClearPass Policy Manager (CPPM) cluster (which uses version 6.10).

The customer has several requirements for authentication. The clients should only pass EAP-TLS authentication if a query to Azure AD shows that they have accounts in Azure AD. To further refine the clients’ privileges, ClearPass also should use information collected by Intune to make access control decisions.

Assume that the Azure AD deployment has the proper prerequisites established.

You are planning the CPPM authentication source that you will reference as the authentication source in 802.1X services.

How should you set up this authentication source?

A.

As Kerberos type

B.

As Active Directory type

C.

As HTTP type, referencing the Intune extension

D.

AS HTTP type, referencing Azure AD's FODN

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Question # 5

A customer's admins have added RF Protect licenses and enabled WIDS for a customer's AOS 8-based solution. The customer wants to use the built-in capabilities of APs without deploying dedicated air monitors (AMs). Admins tested rogue AP detection by connecting an unauthorized wireless AP to a switch. The rogue AP was not detected even after several hours.

What is one point about which you should ask?

A.

Whether APs' switch ports support all the VLANs that are accessible at the edge

B.

Whether admins enabled wireless containment

C.

Whether admins set at least one radio on each AP to air monitor mode

D.

Whether the customer is using non-standard Wi-Fi channels in the deployment

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Question # 6

Refer to the exhibit.

Aruba ClearPass Policy Manager (CPPM) is using the settings shown in the exhibit. You reference the tag shown in the exhibit in enforcement policies related to NASes of several types, including Aruba APs, Aruba gateways, and AOS-CX switches.

What should you do to ensure that clients are reclassified and receive the correct treatment based on the tag?

A.

Change the RADIUS action to [Aruba Wireless -Terminate Session] which is supported by all the NASes in question.

B.

Change the RADIUS action to [Aruba Wireless - Bounce Switch Port] which is supported by all the NASes in question.

C.

Enable profiling in each service using one of these enforcement profiles. Set the profiling action to the correct one for the NASes using that service.

D.

Set the Tags Update Action to No Action. Then instead enable the RADIUS CoAs using enforcement profiles in the rules that match clients with the tag shown in the exhibit.

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Question # 7

You want to use Device Insight tags as conditions within CPPM role mapping or enforcement policy rules.

What guidelines should you follow?

A.

Create an HTTP authentication source to the Central API that queries for the tags. To use that source as the type for rule conditions, add it an authorization source for the service in question.

B.

Use the Application type for the rule conditions; no extra authorization source is required for services that use policies with these rules.

C.

Use the Endpoints Repository type for the rule conditions; Add Endpoints Repository as a secondary authentication source for services that use policies with these rules.

D.

Use the Endpoint type for the rule conditions; no extra authorization source is required for services that use policies with these rules.

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Question # 8

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?

A.

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

B.

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

C.

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

D.

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

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Question # 9

Refer to the scenario.

# Introduction to the customer

You are helping a company add Aruba ClearPass to their network, which uses Aruba network infrastructure devices.

The company currently has a Windows domain and Windows CA. The Window CA issues certificates to domain computers, domain users, and servers such as domain controllers. An example of a certificate issued by the Windows CA is shown here.

The company is in the process of adding Microsoft Endpoint Manager (Intune) to manage its mobile clients. The customer is maintaining the on-prem AD for now and uses Azure AD Connect to sync with Azure AD.

# Requirements for issuing certificates to mobile clients

The company wants to use ClearPass Onboard to deploy certificates automatically to mobile clients enrolled in Intune. During this process, Onboard should communicate with Azure AD to validate the clients. High availability should also be provided for this scenario; in other words, clients should be able to get certificates from Subscriber 2 if Subscriber 1 is down.

The Intune admins intend to create certificate profiles that include a UPN SAN with the UPN of the user who enrolled the device.

# Requirements for authenticating clients

The customer requires all types of clients to connect and authenticate on the same corporate SSID.

The company wants CPPM to use these authentication methods:

EAP-TLS to authenticate users on mobile clients registered in Intune

TEAR, with EAP-TLS as the inner method to authenticate Windows domain computers and the users on them

To succeed, EAP-TLS (standalone or as a TEAP method) clients must meet these requirements:

Their certificate is valid and is not revoked, as validated by OCSP

The client’s username matches an account in AD

# Requirements for assigning clients to roles

After authentication, the customer wants the CPPM to assign clients to ClearPass roles based on the following rules:

Clients with certificates issued by Onboard are assigned the “mobile-onboarded” role

Clients that have passed TEAP Method 1 are assigned the “domain-computer” role

Clients in the AD group “Medical” are assigned the “medical-staff” role

Clients in the AD group “Reception” are assigned to the “reception-staff” role

The customer requires CPPM to assign authenticated clients to AOS firewall roles as follows:

Assign medical staff on mobile-onboarded clients to the “medical-mobile” firewall role

Assign other mobile-onboarded clients to the “mobile-other” firewall role

Assign medical staff on domain computers to the “medical-domain” firewall role

All reception staff on domain computers to the “reception-domain” firewall role

All domain computers with no valid user logged in to the “computer-only” firewall role

Deny other clients access

# Other requirements

Communications between ClearPass servers and on-prem AD domain controllers must be encrypted.

# Network topology

For the network infrastructure, this customer has Aruba APs and Aruba gateways, which are managed by Central. APs use tunneled WLANs, which tunnel traffic to the gateway cluster. The customer also has AOS-CX switches that are not managed by Central at this point.

# ClearPass cluster IP addressing and hostnames

A customer’s ClearPass cluster has these IP addresses:

Publisher = 10.47.47.5

Subscriber 1 = 10.47.47.6

Subscriber 2 = 10.47.47.7

Virtual IP with Subscriber 1 and Subscriber 2 = 10.47.47.8

The customer’s DNS server has these entries

cp.acnsxtest.com = 10.47.47.5

cps1.acnsxtest.com = 10.47.47.6

cps2.acnsxtest.com = 10.47.47.7

radius.acnsxtest.com = 10.47.47.8

onboard.acnsxtest.com = 10.47.47.8

The customer has now decided that it needs CPPM to assign certain mobile-onboarded devices to a “nurse-call” AOS user role. These are mobile-onboarded devices that are communicating with IP address 10.1.18.12 using port 4343.

What are the prerequisites for fulfilling this requirement?

A.

Setting up traffic classes and role mapping rules within Central's global settings

B.

Creating server-based role assignment rules on APs that apply roles to clients based on traffic destinations

C.

Creating server-based role assignment rules on gateways that apply roles to clients based on traffic destinations

D.

Creating a tag on Central to select the proper destination connection and integrating CPPM with Device Insight

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Question # 10

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

A.

Use of IPv6 addressing instead of IPv4 addressing

B.

Lack of encryption

C.

Use of less common protocols such as SNAP

D.

Periodic transmission of small, identically sized packets

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Question # 11

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 the developer find the right URI for the monitor.

Refer to the exhibit.

You have used the REST API reference interface to submit a test call. The results are shown in the exhibit.

Which URI should you give to the developer?

A.

/rest/v1/system/vrfs/mgmt/radius/servers/cp.acnsxtest.local/2083/tcp?attributes=authstatistics

B.

/rest/v1/system/vrfs/mgmt/radius/servers/cp.acnsxtest.local/2083/tcp?attributes=authstatistics?attributes=access_rejects

C.

/rest/v1/system/vrfs/mgmt/radius/_servers/cp.acnsxtest.local/2083/tcp

D.

/rest/v1/system/vrfs/mgmt/radius/servers/cp.acnsxtest.local/2083/tcp?attributes=authstatistics.access_rejects

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Question # 12

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.

You are setting up the UBT zone on an AOS-CX switch.

Which IP addresses should you define in the zone?

A.

Primary controller = 10.20.4.21; backup controller = 10.20.4.22

B.

[Primary controller = 198.51.100.14; backup controller = 10.20.4.21

C.

Primary controller = 10 20 4 21: backup controller not defined

D.

Primary controller = 10.20.20.254; backup controller, not defined

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Question # 13

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 exhibits below show the configuration for the role.

There are multiple issues with the configuration.

What is one of the changes that you must make to the policies 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 8 is “ipv4 any any any permit’.)

A.

In the “medical-mobile” policy, change the source in rule 1 to “user.”

B.

In the “medical-mobile” policy, change the subnet mask in rule 3 to 255.255.248.0.

C.

In the “medical-mobile” policy, move rules 6 and 7 to the top of the list.

D.

Move the rule in the “apprf-medical-mobile-sacl” policy between rules 7 and 8 in the “medical-mobile” policy.

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Question # 14

A customer wants CPPM to authenticate non-802.1X-capable devices. An admin has created the service shown in the exhibits below:

What is one recommendation to improve security?

A.

Adding an enforcement policy rule that denies access to endpoints with the Conflict flaq

B.

Using Active Directory as the authentication source

C.

Creating and using a custom MAC-Auth authentication method

D.

Enabling caching of posture and roles

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Question # 15

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?

A.

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

B.

Defining a baseline and referring to it for the value

C.

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

D.

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

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Question # 16

Refer to the scenario.

A hospital has an AOS10 architecture that is managed by Aruba Central. The customer has deployed a pair of Aruba 9000 Series gateways with Security licenses at each clinic. The gateways implement IDS/IPS in IDS mode.

The Security Dashboard shows these several recent events with the same signature, as shown below:

Which step could give you valuable context about the incident?

A.

View firewall sessions on the APs and record the threat sources' type and OS.

B.

View the user-table on APs and record the threat sources' 802.11 settings.

C.

View the RAPIDS Security Dashboard and see if the threat sources are listed as rogues.

D.

Find the Central client profile for the threat sources and note their category and family.

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Question # 17

Refer to the scenario.

A customer has asked you to review their AOS-CX switches for potential vulnerabilities. The configuration for these switches is shown below:

What is one recommendation to make?

A.

Let the RADIUS server confiqure VLANs on LAG 1 dynamically.

B.

Use MDS instead of SHA1 for the NTP authentication key.

C.

Encrypt the certificate in the TA-profile.

D.

Create a control plane ACL to limit the sources that can access the switch with SSH.

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Question # 18

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?

A.

ARP proxy is not enabled on VLAN 4.

B.

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

C.

DHCP snooping is not enabled on VLAN 4.

D.

Edge ports are not configured as untrusted for ARP inspection.

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