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Palo Alto Networks Network Security Analyst Sample Questions:

1. A large-scale deployment uses Panorama to manage hundreds of Palo Alto Networks firewalls. An External Dynamic List (EDL) for 'IP Address' type is centrally configured on Panorama, pointing to an internal threat intelligence server. Which of the following statements accurately describes the operational flow and considerations when this EDL is applied to Security Policy rules pushed from Panorama to the managed firewalls?

A) EDLs configured on Panorama can only be used in Pre-Rulebase or Post-Rulebase policies, not in shared rulebases.
B) Only firewalls with Panorama's 'Threat Prevention' subscription can utilize EDLs configured on Panorama.
C) Each managed firewall independently fetches the EDL content directly from the threat intelligence server based on its configured refresh interval, and Panorama only distributes the EDL object definition.
D) If the threat intelligence server is unreachable, Panorama will cache the last known good list and push it to all firewalls.
E) Panorama fetches the EDL content and pushes the entire list to each firewall during a policy commit.

2. A company is implementing a zero-trust architecture. As part of this, they need to restrict SSH access to their critical production servers. Specifically, SSH access should only be permitted from a jump host and only if the SSH client is running a specific, approved version. All other SSH attempts, even from the jump host, should be denied if the client version does not match. Which combination of Palo Alto Networks features would enable this level of granular control?

A) Security Policy with Source IP of Jump Host, Destination IP of Production Servers, Application 'ssh'. Additionally, create a 'Custom Application' signature (or leverage an existing application's capabilities if available) that matches the specific SSH client version string within the SSH protocol handshake, then apply this custom application in the policy with an 'Allow' action.
B) Deploy a 'Vulnerability Protection' profile with a custom signature to detect the unapproved SSH client versions and apply it to the outbound security policy from the jump host.
C) User-ID for authenticated jump host users, a Security Policy with Source IP of Jump Host, Destination IP of Production Servers, Application 'ssh', and a 'URL Filtering' profile to inspect SSH client strings.
D) GlobalProtect with Host Information Profile (HIP) checks to verify the SSH client version on the jump host, combined with a Security Policy allowing traffic based on HIP match.
E) Security Policy for Source IP of Jump Host, Destination IP of Production Servers, Application 'ssh', and a 'File Blocking' profile to block unapproved SSH versions.

3. A large enterprise utilizes multiple Palo Alto Networks firewalls globally. They wish to distribute custom blacklists (IP and URL) to all firewalls efficiently and consistently using External Dynamic Lists. They also need to ensure that the lists are updated frequently (every 5 minutes) and are resilient to single points of failure. Which combination of strategies would best meet these requirements?

A) Host EDLs on a single, centralized web server with a public IP address and configure all firewalls to pull from it with a 5-minute repeat interval.
B) Use Panorama to push static IP address and URL objects to all firewalls every 5 minutes.
C) Create a script on each firewall to curl the blacklist sources every 5 minutes and update a custom application.
D) Deploy a high-availability pair of web servers within the internal network to host the EDLs, configure all firewalls to pull from a DNS record resolving to the HA pair, and set the repeat interval to 5 minutes.
E) Manually copy the blacklist files to each firewall's local disk and configure local EDLs with a 'Never' repeat interval.

4. A Palo Alto Networks firewall is reporting consistently high data plane CPU utilization (around 80-90%), but the management plane CPU remains low. Users are experiencing intermittent packet loss and application latency. You suspect a large volume of specific traffic types or signatures are consuming resources. Which of the following steps would be most effective in identifying the specific traffic causing the high data plane utilization?

A) Run show session all filter application for known high-bandwidth applications.
B) Enable packet capture on the firewall for all interfaces and analyze the pcap file using Wireshark.
C) Check the BFD (Bidirectional Forwarding Detection) status for all configured interfaces.
D) Utilize the ACC (Application Command Center) to filter for 'Top Applications' and 'Top Threats' over the last hour.
E) Execute debug flow basic on the CLI for a problematic source IP to trace packet flow.

5. A critical infrastructure organization is upgrading its SCADA network and has deployed Palo Alto Networks NGFWs to secure the environment. They need to implement an IoT security profile that strictly adheres to the Purdue Model for segmentation and communication. Specifically, they want to:
1. Allow only specific Modbus/TCP function codes (Read Coils, Read Holding Registers) between Zone 3 (Control Servers) and Zone 2 (PLCs).
2. Block all internet access for devices in Zone 2 and Zone 3.
3. Alert on any new, unclassified device attempting to communicate within Zone 2 or Zone 3.
4. Implement signature-based protection against known ICS exploits.
Which of the following configuration steps, in combination, are necessary to achieve these requirements using a Palo Alto Networks IoT Security Profile and related features? (Multiple Response)

A) Utilize 'Device-ID' within the IoT Security Profile to automatically identify and classify devices in Zone 2 and Zone 3. Configure 'IoT Policy Rules' to use 'IoT Device Groups' as source/destination and set 'Action: Alert' for unknown device communication attempts.
B) Configure a 'Vulnerability Protection' profile with a focus on 'Critical' and 'High' severity signatures, especially those related to SCADA/ICS vulnerabilities, and apply it to all relevant security policies.
C) Configure 'Security Policies' with 'Source Zone: Zone 2/3', 'Destination Zone: Untrust', 'Application: any', 'Service: any', and 'Action: Deny'. Ensure these rules are placed higher than any default permit rules.
D) Create a custom 'Anti-Spyware' profile with specific Modbus/TCP signatures and apply it to all security rules for Zone 2 and Zone 3 traffic.
E) Create an 'IoT Security Profile' for ICS, enabling 'Application Function Filtering' for Modbus/TCP to permit only 'Read Coils' and 'Read Holding Registers'. Apply this profile to an 'IoT Policy Rule' between Zone 3 and Zone 2, with 'Application' set to 'modbus-tcp'.

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