Question 370
At a distributed branch estate, a test team is validating a change after this incident: A cloud firewall has a newly created dynamic block list but continues permitting known listed addresses because no Security rule references it. What evidence most directly verifies the intended outcome?
Explanation
Correct Answer
Controlled listed test addresses hit the intended Security rule rather than an unrelated allow. This evidence directly tests the intended corrective action: Add the IP external dynamic list to the relevant source or destination match in the deny rule and deploy it. It confirms the failure mechanism—Downloading a list object alone does not enforce policy without the matching rule reference.—has been addressed in the actual affected flow.
Incorrect Answers
The critical IP indicators appear in effective entries and capacity-related System log errors clear. This would verify resolution of a different case: A small firewall reaches its supported EDL capacity and lower-priority feeds are not fully loaded as a result. It does not show that the reported issue was fixed or that its intended action—Add the IP external dynamic list to the relevant source or destination match in the deny rule and deploy it.—worked.
A safe test hostname is evaluated by the intended domain-aware control without assuming a fixed IP address. This would verify resolution of a different case: A security team wants to block dynamically changing malicious hostnames but creates only an IP EDL that becomes outdated after DNS changes. It does not show that the reported issue was fixed or that its intended action—Add the IP external dynamic list to the relevant source or destination match in the deny rule and deploy it.—worked.
The firewall reports a successful list refresh and sees the expected test entry. This would verify resolution of a different case: A threat feed is reachable from an analyst workstation but the managed firewall's EDL retrieval fails because its management egress cannot reach the host. It does not show that the reported issue was fixed or that its intended action—Add the IP external dynamic list to the relevant source or destination match in the deny rule and deploy it.—worked.