Question 740
At Eastshore Energy, the network engineering team administers FortiGate-based protection for remote service offices and central management systems under requirements for fault-tolerant WAN links and policy audit trails. The security reviewer verifies a claimed fix for: Users are allowed by firewall policy but lose WAN connectivity after interfaces are moved into an SD-WAN zone while the old policy still references physical ports. Which observed outcome BEST demonstrates that the intended correction works?
Explanation
Correct Answer
The office test subnet reaches approved internet services through the SD-WAN zone without broadening the existing source policy. This outcome validates the intended correction for: Users are allowed by firewall policy but lose WAN connectivity after interfaces are moved into an SD-WAN zone while the old policy still references physical ports. The associated approved corrective action is: Update the relevant firewall policy interface mapping to the supported SD-WAN zone and preserve address and service restrictions. The Eastshore Energy reviewer can therefore distinguish observable protection from an untested configuration claim.
Incorrect Answers
Routing inspection and a controlled path test confirm the target subnet uses the authorized next hop. This would verify a separate corrective action: Remove or correct the conflicting more-specific route while keeping the necessary broader route and intended segmentation. That separate change addresses: A static route is correct but a newly added more-specific destination route unexpectedly hijacks only one application subnet. It does not validate the current Eastshore Energy issue: Users are allowed by firewall policy but lose WAN connectivity after interfaces are moved into an SD-WAN zone while the old policy still references physical ports. The relevant acceptance evidence is: The office test subnet reaches approved internet services through the SD-WAN zone without broadening the existing source policy.
The remote test endpoint observes the intended FortiGate source IP and the local-out probe follows the expected gateway. This would verify a separate corrective action: Configure the supported local-out source interface and address for the diagnostic or management traffic independently of transit routing. That separate change addresses: A packet capture shows traffic on the expected ingress port but the firewall replies using the wrong source address for its own local-out probe. It does not validate the current Eastshore Energy issue: Users are allowed by firewall policy but lose WAN connectivity after interfaces are moved into an SD-WAN zone while the old policy still references physical ports. The relevant acceptance evidence is: The office test subnet reaches approved internet services through the SD-WAN zone without broadening the existing source policy.
A new test session follows the healthy default gateway and the routing table no longer selects the disconnected next hop. This would verify a separate corrective action: Correct the default static route next hop and distance for the usable gateway and validate the intended failover path. That separate change addresses: A FortiGate has two internet uplinks but a stale lower-distance static default route still points to a disconnected WAN interface. It does not validate the current Eastshore Energy issue: Users are allowed by firewall policy but lose WAN connectivity after interfaces are moved into an SD-WAN zone while the old policy still references physical ports. The relevant acceptance evidence is: The office test subnet reaches approved internet services through the SD-WAN zone without broadening the existing source policy.