Question 300
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. An independent validation is requested for: Two private data-center networks require end-to-end source-address auditing, but a generic LAN-to-LAN firewall policy applies internet-style SNAT. Which observed outcome BEST demonstrates that the intended correction works?
Explanation
Correct Answer
The destination server observes the original client address and the bidirectional session completes under the correct policy. This outcome validates the intended correction for: Two private data-center networks require end-to-end source-address auditing, but a generic LAN-to-LAN firewall policy applies internet-style SNAT. The associated approved corrective action is: Disable unnecessary source NAT for the private routed path while preserving the explicit allow rule and reachable return route. The Eastshore Energy reviewer can therefore distinguish observable protection from an untested configuration claim.
Incorrect Answers
A harmless controlled test matching an intended security rule generates an inspection event on the correct traffic policy. This would verify a separate corrective action: Attach the appropriate antivirus, web, application and IPS profiles to the matching policy using supported inspection modes. That separate change addresses: A firewall allow rule is installed without the required content security profile and traffic bypasses the organization's documented inspection policy. It does not validate the current Eastshore Energy issue: Two private data-center networks require end-to-end source-address auditing, but a generic LAN-to-LAN firewall policy applies internet-style SNAT. The relevant acceptance evidence is: The destination server observes the original client address and the bidirectional session completes under the correct policy.
Two test users behind the same translated address receive their intended different policy results without identity confusion. This would verify a separate corrective action: Avoid relying solely on IP-based FSSO for shared-address users and use an appropriate per-user authentication method for that network. That separate change addresses: Many remote users share one NAT gateway source address and FSSO attributes that IP to one user, granting mismatched policies to others. It does not validate the current Eastshore Energy issue: Two private data-center networks require end-to-end source-address auditing, but a generic LAN-to-LAN firewall policy applies internet-style SNAT. The relevant acceptance evidence is: The destination server observes the original client address and the bidirectional session completes under the correct policy.
A test logon appears with consistent timestamps in the domain event, collector status and firewall identity monitor. This would verify a separate corrective action: Align trusted NTP sources and review consistent time handling across all relevant FSSO components. That separate change addresses: FSSO user mappings have incorrect expiry times because domain controllers, the collector and FortiGate do not share synchronized clocks. It does not validate the current Eastshore Energy issue: Two private data-center networks require end-to-end source-address auditing, but a generic LAN-to-LAN firewall policy applies internet-style SNAT. The relevant acceptance evidence is: The destination server observes the original client address and the bidirectional session completes under the correct policy.