PCNSE Practice Test

D.   Pre-NAT source IP address Pre-NAT source zone

Explanation: When configuring Quality of Service (QoS) policies, particularly for traffic going to or from specific IP addresses and involving NAT, it's important to base the rule on how the firewall processes the traffic. For QoS, the firewall evaluates traffic using pre-NAT IP addresses and zones because QoS policies typically need to be applied before the NAT action occurs. This is especially true for inbound traffic, where the goal is to limit bandwidth before the destination IP is translated.
The correct combination for a QoS rule in this scenario, where the aim is to limit bandwidth for downloads from a specific server (implying inbound traffic to the server), would be:
D. Pre-NAT source IP address Pre-NAT source zone:
Pre-NAT source IP address: This refers to the original IP address of the client or source device before any NAT rules are applied. Since QoS policies are evaluated before NAT, using the pre-NAT IP address ensures that the policy applies to the correct traffic.
Pre-NAT source zone: This is the zone associated with the source interface before NAT takes place. Using the pre-NAT zone ensures that the QoS policy is applied to traffic as it enters the firewall, before any translations or routing decisions are made.
By configuring the QoS rule with pre-NAT information, the firewall can accurately apply bandwidth limitations to the intended traffic, ensuring efficient use of network resources and mitigating the impact of large file downloads from the specified server.
For detailed guidelines on configuring QoS policies, refer to the Palo Alto Networks documentation, which provides comprehensive instructions and best practices for managing bandwidth and traffic priorities on the network.

B.   Performs malicious content analysis on the linked page and the corresponding PE file.

Explanation: Advanced WildFire analyzes both the webpage linked by the URL and any files (like PE files) that are downloaded as a result of clicking that link. This includes checking the linked webpage for malicious content and sending any downloaded files for further analysis to determine their behavior and potential malicious intent. The PCNSA Study Guide outlines that WildFire inspects and analyzes both content downloaded and webpages involved when integrated into the organization's security profile . This dual-layered approach ensures comprehensive protection against threats from both the webpage and its payloads.
Explanation: Advanced WildFire analyzes both the webpage linked by the URL and any files (like PE files) that are downloaded as a result of clicking that link. This includes checking the linked webpage for malicious content and sending any downloaded files for further analysis to determine their behavior and potential malicious intent.
The PCNSA Study Guide outlines that WildFire inspects and analyzes both content downloaded and webpages involved when integrated into the organization's security profile . This dual-layered approach ensures comprehensive protection against threats from both the webpage and its payloads.
Step-by-Step Explanation
Link Clicked and File Download Triggered:
URL Inspection by WildFire:
Forwarding the PE File for Analysis:
Dynamic and Static Analysis:
Threat Verdict:
Automated Response:
Signature Update:
Advanced WildFire Configuration and Behavior
Forwarding File Types:
The WildFire analysis profile must be configured to forward relevant file types. In this case:
PE files are commonly forwarded by default since they are a known vector for malware.
Administrators can define custom forwarding rules based on file type and traffic.
Integration with the Security Profile:
WildFire integrates with other security profiles (e.g., Antivirus, Anti-Spyware, URL Filtering).
URL Filtering ensures that the link itself is categorized and blocked if malicious.
WildFire's output informs and updates the threat prevention database dynamically.
Why the Answer is B?
WildFire performs dual analysis:
This layered analysis ensures robust protection against modern threats, which often combine malicious webpages with harmful payloads.

C.   PAN-DB URL category in URL Filtering profile

C.   East

Explanation: Based on the provided table, the GlobalProtect portal agent configuration includes four gateways with varying priorities and response times. Users will connect to the gateway with the highest priority and, if multiple gateways share the same priority, the one with the lowest response time.
Answer Determination

• Prioritize by Priority Level:
• Evaluate Response Times Within Each Priority:

Given the highest priority is "East" with a response time of 35 ms, users will connect to the East gateway based on the highest priority.

A.   Navigate to Objects > Security Profiles > Anti-Spyware Select related profile Select DNS exceptions tabs Search related threat ID and click enable Commit

Explanation: When dealing with a false positive, particularly for a spyware threat detected through DNS queries (as indicated by the category "dns-c2"), the correct course of action involves creating an exception in the Anti-Spyware profile, not the Vulnerability Protection profile. This is because the Anti-Spyware profile in Palo Alto Networks firewalls is designed to detect and block spyware threats, which can include command and control (C2) activities often signaled by DNS queries.
The steps to configure an exception for this specific spyware signature (threat ID: 1000011111) are as follows:
Navigate to Objects > Security Profiles > Anti-Spyware. This is where all the Anti- Spyware profiles are listed.
Select the related Anti-Spyware profile that is currently applied to the security policy which is generating the false positive.
Within the profile, go to the DNS Exceptions tab. This tab allows you to specify exceptions based on DNS signatures.
Search for the related threat ID (in this case, 1000011111) and click enable to create an exception for it. By doing this, you instruct the firewall to bypass the detection for this specific signature, effectively treating it as a false positive.
Commit the changes to make the exception active.
By following these steps, the administrator can effectively address the false positive without disabling the overall spyware protection capabilities of the firewall.