Question 810
After one ISP fails, the IPsec tunnel SA is healthy through the backup WAN yet its SD-WAN service rule still steers business traffic to the unavailable original overlay path. Which observable result BEST demonstrates that the intended FortiGate security or connectivity requirement is satisfied?
Explanation
Correct Answer
Private application sessions traverse an eligible encrypted overlay with tested failover and stable return routing across the WAN links. This is the operational validation outcome rather than merely an enabled setting. An SD-WAN member rule may select a physical underlay without providing the encrypted overlay route; policy, tunnel health and overlay steering are distinct dependencies. Scenario: After one ISP fails, the IPsec tunnel SA is healthy through the backup WAN yet its SD-WAN service rule still steers business traffic to the unavailable original overlay path.
Incorrect Answers
Approved HTTPS content receives the intended inspection depth while unsupported or privacy-sensitive traffic follows explicit reviewed exceptions. This result would test FortiGate certificate inspection versus full SSL/SSH inspection but does not demonstrate the desired FortiGate outcome here. Verify instead: Private application sessions traverse an eligible encrypted overlay with tested failover and stable return routing across the WAN links. Scenario: After one ISP fails, the IPsec tunnel SA is healthy through the backup WAN yet its SD-WAN service rule still steers business traffic to the unavailable original overlay path.
The desired category or hostname restriction is enforced where supported and any path-based policy explicitly requires appropriate decrypting inspection. This result would test HTTPS web filtering hostname limitations and logging but does not demonstrate the desired FortiGate outcome here. Verify instead: Private application sessions traverse an eligible encrypted overlay with tested failover and stable return routing across the WAN links. Scenario: After one ISP fails, the IPsec tunnel SA is healthy through the backup WAN yet its SD-WAN service rule still steers business traffic to the unavailable original overlay path.
The tunnel negotiates and maintains encrypted traffic across the approved NAT boundary without untracked port remapping or blocked IKE packets. This result would test IPsec NAT traversal with upstream address translation but does not demonstrate the desired FortiGate outcome here. Verify instead: Private application sessions traverse an eligible encrypted overlay with tested failover and stable return routing across the WAN links. Scenario: After one ISP fails, the IPsec tunnel SA is healthy through the backup WAN yet its SD-WAN service rule still steers business traffic to the unavailable original overlay path.