The correct answer is to add the URL to an allow list in the URL filtering profile. When the traffic log explicitly shows a 'URL Filtering' block, it means the firewall’s URL filtering mechanism—not the security policy—is denying the session based on the URL’s category or a custom block list. Adding the specific URL to an allow list within the URL filtering profile overrides that block while keeping the security rule and all other filtering policies active, preserving broader security controls. On the Palo Alto Networks Certified Network Security Engineer PCNSE exam, this scenario tests your understanding of URL filtering profile hierarchy: allow lists take precedence over block lists and category-based actions. A common trap is to modify the security policy or disable URL filtering entirely, which would weaken security for other traffic. Remember the mnemonic “Allow overrides All” to recall that an allow list entry in the URL filtering profile will always permit the URL, regardless of its category or other block settings.
PCNSE Troubleshoot Practice Question
This PCNSE practice question tests your understanding of troubleshoot. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user reports that they cannot access a specific website. The firewall security policy allows web traffic. The administrator checks the traffic log and sees that the session is being denied due to a 'URL Filtering' block. What should the administrator do to allow access?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add the URL to an allow list in the URL filtering profile
Option D is correct because the traffic log explicitly indicates a 'URL Filtering' block, meaning the firewall's URL filtering profile is denying the request based on the URL category or specific URL. Adding the URL to an allow list within the URL filtering profile overrides the block, allowing access while keeping the security rule and other filtering policies intact. This approach preserves security controls for other traffic and avoids disabling URL filtering entirely.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Disable URL filtering on the existing security rule
Why it's wrong here
Disabling URL filtering entirely is excessive and may expose the network.
✗
Check the user-ID mapping to ensure the user is authenticated
Why it's wrong here
User-ID is not required for URL filtering to block.
✗
Create a new security rule allowing the user's IP to any
Why it's wrong here
This would bypass URL filtering for that user, which is not the best practice.
✓
Add the URL to an allow list in the URL filtering profile
Why this is correct
This allows the specific URL while keeping the profile active.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may assume disabling URL filtering entirely (Option A) is the quickest fix, but the PCNSE exam tests the understanding that URL filtering profiles should be modified granularly using allow/block lists rather than disabling the feature completely.
Detailed technical explanation
How to think about this question
URL filtering profiles in Palo Alto Networks firewalls use a combination of predefined URL categories (e.g., 'gambling', 'social-networking') and custom URL lists (allow list, block list) to enforce access policies. The allow list takes precedence over category-based blocks, so adding a specific URL to the allow list permits access even if the URL's category is blocked. In a real-world scenario, an administrator might need to allow a legitimate business website that is miscategorized by the PAN-DB URL database, and using the allow list is the correct method without altering the broader security posture.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Troubleshoot — This question tests Troubleshoot — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add the URL to an allow list in the URL filtering profile — Option D is correct because the traffic log explicitly indicates a 'URL Filtering' block, meaning the firewall's URL filtering profile is denying the request based on the URL category or specific URL. Adding the URL to an allow list within the URL filtering profile overrides the block, allowing access while keeping the security rule and other filtering policies intact. This approach preserves security controls for other traffic and avoids disabling URL filtering entirely.
What should I do if I get this PCNSE question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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