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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?
When would you implement BPDU protection on an AOS-CX switch port versus BPDU filtering?
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?
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 You have started to create a CA to meet the customer's requirements for issuing certificates to mobile clients, as shown in the exhibit below. What change will help to meet those requirements and the requirements for authenticating clients?
Refer to the exhibit. Which security issue is possibly indicated by this traffic capture?
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. The customer wants you to configure CPPM to collect information from Intune on demand during the authentication process. What should you tell the Intune admins about the certificates issued to clients?
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 You have imported the root certificate for the Windows CA to the ClearPass CA Trust list. Which usages should you add to it based on the scenario requirements?
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?
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?
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?

Question 45 - HPE6-A84 discussion

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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.
Answers
A.
ARP proxy is not enabled on VLAN 4.
B.
LAG 1 is configured as trusted for ARP inspection but should be untrusted.
Answers
B.
LAG 1 is configured as trusted for ARP inspection but should be untrusted.
C.
DHCP snooping is not enabled on VLAN 4.
Answers
C.
DHCP snooping is not enabled on VLAN 4.
D.
Edge ports are not configured as untrusted for ARP inspection.
Answers
D.
Edge ports are not configured as untrusted for ARP inspection.
Suggested answer: D

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

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asked 16/09/2024
Elham Alasmari
36 questions
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