Question 140
At Bluehaven Transit, the operations firewall team administers FortiGate-based protection for rail operations support and scheduling applications under requirements for safe change windows and precise branch access. The security reviewer verifies a claimed fix for: Packets arrive at FortiGate but disappear during forwarding and ordinary interface counters cannot identify the policy or route decision. Which observed outcome BEST demonstrates that the intended correction works?
Explanation
Correct Answer
The debug trace identifies the evaluated policy and route for a controlled test flow, enabling a targeted correction rather than blanket allow rules. This outcome validates the intended correction for: Packets arrive at FortiGate but disappear during forwarding and ordinary interface counters cannot identify the policy or route decision. The associated approved corrective action is: Use scoped FortiOS debug-flow diagnostics with source and destination filters to inspect policy and forwarding decisions. The Bluehaven Transit reviewer can therefore distinguish observable protection from an untested configuration claim.
Incorrect Answers
Clients in each VLAN use the correct gateway and forbidden traffic between the segments is denied by the expected policy. This would verify a separate corrective action: Create the required VLAN subinterfaces with matching switch tagging, distinct IP subnets and explicit inter-VLAN policies. That separate change addresses: Two office networks share one untagged FortiGate port but their traffic must have separate gateways and firewall policies. It does not validate the current Bluehaven Transit issue: Packets arrive at FortiGate but disappear during forwarding and ordinary interface counters cannot identify the policy or route decision. The relevant acceptance evidence is: The debug trace identifies the evaluated policy and route for a controlled test flow, enabling a targeted correction rather than blanket allow rules.
The cloud service reports the intended CNF integration and policy controls without requiring an unsupported manual appliance attachment. This would verify a separate corrective action: Select the documented FortiGate CNF service workflow for the supported cloud provider and keep VM deployments as a distinct model. That separate change addresses: A security team conflates FortiGate Cloud-Native Firewall with manually managing a general-purpose FortiGate VM and chooses the wrong onboarding workflow. It does not validate the current Bluehaven Transit issue: Packets arrive at FortiGate but disappear during forwarding and ordinary interface counters cannot identify the policy or route decision. The relevant acceptance evidence is: The debug trace identifies the evaluated policy and route for a controlled test flow, enabling a targeted correction rather than blanket allow rules.
The analyzer lists the authorized FortiGate and receives a fresh test security event with the correct device identity. This would verify a separate corrective action: Complete FortiAnalyzer device registration, authorization and the supported logging transport and device settings. That separate change addresses: A FortiGate sends logs to a FortiAnalyzer address but the analyzer never receives them because device registration and authorization are incomplete. It does not validate the current Bluehaven Transit issue: Packets arrive at FortiGate but disappear during forwarding and ordinary interface counters cannot identify the policy or route decision. The relevant acceptance evidence is: The debug trace identifies the evaluated policy and route for a controlled test flow, enabling a targeted correction rather than blanket allow rules.