Question 800
At Redstone Aviation, the network engineering team administers FortiGate-based protection for approved aviation maintenance and scheduling networks under requirements for separated administrative flows and resilient site VPNs. The security reviewer verifies a claimed fix for: An IPsec security association is up yet the FortiGate routing table has no path from the local VLAN to the remote protected prefix. Which observed outcome BEST demonstrates that the intended correction works?
Explanation
Correct Answer
A fresh authorized branch-to-branch connection chooses the tunnel route and receives a permitted return path. This outcome validates the intended correction for: An IPsec security association is up yet the FortiGate routing table has no path from the local VLAN to the remote protected prefix. The associated approved corrective action is: Add the specific static or supported dynamic route toward the IPsec tunnel interface and preserve routing segmentation. The Redstone Aviation reviewer can therefore distinguish observable protection from an untested configuration claim.
Incorrect Answers
A planned primary node failover restores protected site traffic within the measured approved recovery time without duplicate active tunnels. This would verify a separate corrective action: Document and implement supported FGCP and IPsec failover behavior and coordinate peer reconnection or SA recovery with recovery objectives. That separate change addresses: The active FortiGate node fails in an HA pair and site-to-site VPN sessions do not recover within the expected time because tunnel and HA roles were not tested. It does not validate the current Redstone Aviation issue: An IPsec security association is up yet the FortiGate routing table has no path from the local VLAN to the remote protected prefix. The relevant acceptance evidence is: A fresh authorized branch-to-branch connection chooses the tunnel route and receives a permitted return path.
A controlled reconnection creates an attributable IKE negotiation log with the peer identity and reason for any failure. This would verify a separate corrective action: Enable appropriate VPN event logging and scoped diagnostics on both authorized peers before changing cryptographic proposals. That separate change addresses: A FortiGate IPsec connection intermittently fails but its VPN event logs are disabled and no one can correlate negotiation attempts. It does not validate the current Redstone Aviation issue: An IPsec security association is up yet the FortiGate routing table has no path from the local VLAN to the remote protected prefix. The relevant acceptance evidence is: A fresh authorized branch-to-branch connection chooses the tunnel route and receives a permitted return path.
The partner reaches its contracted test service but access attempts to a protected unrelated subnet are denied and logged. This would verify a separate corrective action: Review and narrow the wizard-generated route and firewall policy objects to the approved partner prefixes and application ports. That separate change addresses: A FortiGate IPsec wizard created broad default policies for a partner VPN and the partner can reach sensitive networks outside the signed agreement. It does not validate the current Redstone Aviation issue: An IPsec security association is up yet the FortiGate routing table has no path from the local VLAN to the remote protected prefix. The relevant acceptance evidence is: A fresh authorized branch-to-branch connection chooses the tunnel route and receives a permitted return path.