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| Section | Weight | Objectives |
|---|---|---|
| Protect and Defend | 58% | - Security Implementation
|
| Analyze | 38% | - Threat and Log Analysis
|
| Forensics | 4% | - Incident Investigation and Reporting
|
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NEW QUESTION # 11
A customer operates an HPE Aruba Networking ClearPass cluster. The customer has AOS-CX switches that use 802.1X authentication with HPE Aruba Networking ClearPass Policy Manager (CPPM).
The switches use local port-access policies. The customer wants to begin tunneling wired clients that pass only user authentication to an HPE Aruba Networking gateway cluster. The gateway cluster must assign these clients the eth-internet role. The gateway must also assign the clients to VLAN 20.
The intended enforcement policy and profiles are shown below:
* Policy: `written-exam-3`
* Profile: `written-exam-b`
The gateway cluster contains two gateways with the following IP addresses:
Gateway 1: VLAN 4085 (system IP) = 10.20.4.21 | VLAN 20 (users) = 10.20.20.1 | VLAN 4094 (WAN) =
198.51.100.14
Gateway 2: VLAN 4085 (system IP) = 10.20.4.22 | VLAN 20 (users) = 10.20.20.2 | VLAN 4094 (WAN) =
198.51.100.12 | VRRP on VLAN 20 = 10.20.20.254
The customer needs high availability for tunnels between the switches and the gateway cluster. If one gateway fails, the other gateway must take over its tunnels. The switch must also be able to discover the gateway cluster even if one gateway in the cluster is unavailable.
Refer to the scenario. Assume that `myzone` is the name used for the UBT zone.
Which option is a valid minimal configuration for the AOS-CX port-access roles?
Answer: D
Explanation:
In an AOS-CX Dynamic Segmentation architecture using User-Based Tunneling (UBT) in Local VLAN / Reserved VLAN mode, the role assignment and forwarding plane are split between the switch and the gateway cluster.
When a client authenticates via 802.1X, ClearPass sends a RADIUS Access-Accept returning the AOS-CX local port-access role (e.g., `internet-only`). Within the AOS-CX role definition, the command:
`port-access role internet-only gateway-zone zone myzone gateway-role eth-internet` instructs the switch to redirect the client's traffic into the UBT tunnel bound to `myzone` and pass the gateway-role token `eth- internet` to the gateway cluster.
VLAN 20 must not be configured in the switch's local role definition (`vlan access 20`). In Local VLAN mode, the gateway terminates the GRE tunnel, assigns the client to VLAN 20, and handles Layer 3 routing and firewall filtering. Assigning VLAN 20 locally on the switch edge port creates a configuration conflict with the local UBT transport VLAN. Therefore, the minimal and accurate role configuration specifies the gateway-zone and gateway-role without local VLAN access assignment.
References: AOS-CX Port Access and User-Based Tunneling (UBT) Configuration Guide.
NEW QUESTION # 12
Refer to the exhibit, which depicts the topology for an HPE Aruba Networking network.
* Gateways: GW1 (10.1.30.2 / 10.1.36.2), GW2 (10.1.30.3 / 10.1.36.3), VRRP: 10.1.36.1
The gateways have sent the following logs to your Syslog server:
```text
< 142 > Jan 9 18:01:15 GW1 authmgr[6118]: < 124039 > < 6118 > Time-range night-hours activated
< 142 > Jan 9 18:01:15 GW1 authmgr[6118]: < 124040 > < 6118 > Time-range working-hours deactivated
< 142 > Jan 9 18:13:07 GW2 authmgr[6159] : < 124709 > < 6159 > Drop ARP-packet with unknown-IP:
smac:a0:e7:7b:97:a2:98 sender-mac: a0:e7:7b:97:a2:98 sender-ip:10.1.30.2
< 142 > Jan 9 18:13:38 GW2 authmgr[6159]: < 124709 > < 6159 > Drop ARP-packet with unknown-IP:
smac: a0:e7:7b:97:a2:98 sender-mac: a0:e7:7b:97:a2:98 sender-ip:10.1.30.2
< 142 > Jan 9 18:21:24 GW2 isakmpd[6132]: < 103076 > < 6132 > IKEv2 IPSEC Tunnel created for peer
10.1.30.2:500
< 142 > Jan 9 18:21:24 GW2 isakmpd[6132]: < 103101 > < 6132 > IPSEC SA deleted for peer 10.1.30.2
< 142 > Jan 9 18:21:24 GW2 isakmpd[6132]: < 103078 > < 6132 > IKEv2 CHILDSA successful for peer
10.1.30.2:500
< 142 > Jan 9 18:21:26 GW1 isakmpd[6091]: < 103076 > < 6091 > IKEv2 IPSEC Tunnel created for peer
10.1.30.3:500
< 142 > Jan 9 18:21:26 GW1 isakmpd[6091]: < 103101 > < 6091 > IPSEC SA deleted for peer 10.1.30.3
< 142 > Jan 9 18:21:26 GW1 isakmpd[6091]: < 103078 > < 6091 > IKEv2 CHILDSA successful for peer
10.1.30.3:500
```
What potential security issue can be identified from these logs?
Answer: B
Explanation:
Analyzing the syslog output from GW2 highlights critical security warnings generated by the Aruba authentication and firewall process (`authmgr`):
`Drop ARP-packet with unknown-IP: smac:a0:e7:7b:97:a2:98 sender-mac: a0:e7:7b:97:a2:98 sender-ip:
10.1.30.2`
In the documented network topology, `10.1.30.2` is the physical interface IP address assigned to Gateway 1 (GW1). The gateway's Policy Enforcement Firewall (PEF) and stateful user table track authorized hardware MAC addresses associated with infrastructure IP assignments. In this event, an unknown device with MAC address `a0:e7:7b:97:a2:98` transmits ARP packets claiming to own IP address `10.1.30.2`.
Because the sender MAC does not match the valid hardware address of GW1, the gateway identifies this as an ARP spoofing attack and drops the packets. Meanwhile, the subsequent `isakmpd` logs show routine IKEv2 CHILDSA re-keying between peer gateways, ruling out administrative configuration deletion or protocol obsolescence. The active security issue is an unauthorized endpoint attempting to spoof a gateway IP.
References: ArubaOS System Log Message Reference - Authmgr ARP Validation and Spoofing Mitigation.
NEW QUESTION # 13
A customer has an AOS-10 architecture managed by HPE Aruba Networking Central. HPE Aruba Networking infrastructure devices authenticate clients against an HPE Aruba Networking ClearPass cluster.
In HPE Aruba Networking Central, you are reviewing network traffic flows for a wireless IoT device categorized as "Raspberry Pi" clients. You observe SSH traffic. You then review several additional wireless IoT clients and find that they are also sending SSH.
Refer to the scenario.
You are assisting the customer in evaluating ways to mitigate the potential threat detected. The customer wants to temporarily block misbehaving clients for a penalty period. If a client reconnects and no longer sends SSH traffic, it should be permitted to stay connected.
What approach should you take?
Answer: B
Explanation:
To satisfy the precise operational requirement of temporarily blocking a misbehaving client for an automated penalty period and allowing it to resume normal service upon reconnecting (provided it stops transmitting SSH traffic), the Policy Enforcement Firewall (PEF) role-based denylist rule is the optimal mechanism.
By inserting an Access Control Entry (ACE) into the IoT client's assigned AOS user role that matches TCP port 22 (`svc-ssh`) with an action of `deny-and-blacklist` (or `blacklist`), the gateway or AP instantly and autonomously isolates any offending client the moment SSH traffic is generated. The PEF engine assigns a temporary penalty period dictated by the global denylist timer.
Once this timer expires, the entry is flushed automatically from the hardware table. When the client re- authenticates and associates, it is placed back in its standard role. If the client has been remediated and no longer generates SSH packets, it will not trigger the ACE and will maintain uninterrupted connectivity without manual administrator intervention.
References: ArubaOS 10 User Role Policy Configuration, PEF Denylist Actions and Timers.
NEW QUESTION # 14
Introduction to the customer
You are assisting a company with adding HPE Aruba Networking ClearPass to its network, which uses HPE Aruba Networking network-infrastructure devices.
The company already has a Windows domain and Windows CA. The Windows CA issues certificates to domain computers, domain users, and servers such as domain controllers.
ClearPass cluster IP addressing and hostnames
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
Refer to the scenario.
You created a role-mapping policy as displayed in the exhibits below.
Policy Name: written-exam
Rules Evaluation Algorithm: First applicable
Conditions:
1. (Certificate:Issuer-CN EQUALS ClearPass Intune Certificate Authority (Signing))
2. (Authorization:UniversityAD:Groups EQUALS_IGNORE_CASE Medical)
3. (Authorization:UniversityAD:Groups EQUALS_IGNORE_CASE Reception)
4. (Authentication:TEAP-Method-1-Status EQUALS Success)
What one change must you make to this policy?
Answer: C
Explanation:
ClearPass Policy Manager role mapping policies are designed to assign internal TIPs roles to an authentication session based on multi-variable attributes from certificates, directory lookups, and authentication method states.
A critical architectural distinction exists between evaluation algorithms:
* **First applicable**: The policy engine stops evaluating immediately upon finding the first condition that evaluates to true, assigning only the single corresponding role and ignoring all subsequent rules.
* **Select all matches**: The policy engine evaluates all defined rules in sequence, accumulating and assigning all roles whose conditions are satisfied.
In this environment, an onboarded device using TEAP must be evaluated against multiple independent attributes: its certificate authority identity (Rule 1), its Active Directory group membership (Rules 2 or 3), and its machine authentication status (Rule 4). If the policy remains configured as "First applicable," an onboarded mobile device matching Rule 1 will exit immediately, failing to receive necessary AD group roles or machine authentication roles. Switching the evaluation algorithm to "Select all matches" allows ClearPass to aggregate all relevant roles into the session context for downstream enforcement evaluation.
References: ClearPass Policy Manager Architecture - Role Mapping Algorithms and Best Practices.
NEW QUESTION # 15
A client connects to an AOS-CX switch that tunnels the client's traffic to an AOS-10 gateway. The gateway places the client in a role with these rules:
any any svc-dhcp permit
user alias host1 svc-dns permit
user alias net1 svc-https permit
user alias net2 tcp 8086 permit
user alias net3 any deny
user alias net4 svc-https permit
The gateway defines these aliases:
host1 = 10.0.6.8
net1 = 10.0.0.0 255.255.252.0
net2 = 10.0.3.0 255.255.255.0
net3 = 10.0.0.0 255.255.248.0
net4 = 10.0.0.0 255.255.0.0
The client sends these two packets:
1: tcp 8086 to 10.0.3.75
2: https to 10.0.7.24
What occurs?
Answer: B
Explanation:
In HPE Aruba Networking AOS-10 and AOS-8 architectures, user-role access control lists (ACLs) are processed sequentially using top-down first-match evaluation logic. Once a packet matches all criteria specified in an ACE (source, destination, protocol, and port), the defined action (permit or deny) is immediately executed, bypassing all subsequent rules.
Evaluating Packet 1: The client initiates a TCP connection on port 8086 destined for 10.0.3.75.
* Rule 1 matches DHCP (`svc-dhcp`), which does not apply.
* Rule 2 targets `host1` (10.0.6.8) for DNS, which does not match.
* Rule 3 targets `net1` (10.0.0.0/22, covering 10.0.0.0 to 10.0.3.255) for HTTPS (TCP 443); while the destination IP falls within the range, the destination port 8086 does not match.
* Rule 4 matches traffic to `net2` (10.0.3.0/24, covering 10.0.3.0 to 10.0.3.255) on `tcp 8086`. Because
10.0.3.75 falls within 10.0.3.0/24 and the port matches, the packet is explicitly permitted.
Evaluating Packet 2: The client sends HTTPS traffic (TCP 443) destined for 10.0.7.24.
* Rules 1 and 2 do not match.
* Rule 3 matches `net1` (10.0.0.0/22), which covers 10.0.0.0-10.0.3.255; 10.0.7.24 falls outside this subnet.
* Rule 4 matches TCP 8086, failing on port.
* Rule 5 matches destination `net3` (10.0.0.0/21, covering 10.0.0.0 to 10.0.7.255) for `any` service with an action of `deny`. Because 10.0.7.24 falls within 10.0.0.0/21, the packet hits this rule first and is dropped before reaching Rule 6.
Therefore, the first packet is permitted and the second is denied.
References: AOS-10 Gateway Firewall Policies, Policy Enforcement Firewall (PEF), Netdestination and Service Aliases.
NEW QUESTION # 16
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