Question 710
A FortiOS 7.6 team examines: An engineer copies old peer selectors after a renumbering and the protected paths stop matching. Select TWO complementary choices: the most appropriate corrective action AND the specific evidence confirming success.
Explanation
Correct Answers
The reported FortiOS 7.6 condition is: An engineer copies old peer selectors after a renumbering and the protected paths stop matching. The targeted administrative response is: Match approved IPsec phase-two traffic selectors and supported encryption proposals to the intended protected local and remote subnets. The relevant failure risk is: Mismatched traffic selectors can leave phase one healthy while the protected application subnet remains unreachable. Validate with: The intended child security association forms and bidirectional traffic between the approved networks succeeds.
For the observed situation (An engineer copies old peer selectors after a renumbering and the protected paths stop matching), the most specific acceptance evidence is: The intended child security association forms and bidirectional traffic between the approved networks succeeds. It validates the recommended response: Match approved IPsec phase-two traffic selectors and supported encryption proposals to the intended protected local and remote subnets. This addresses the documented risk: Mismatched traffic selectors can leave phase one healthy while the protected application subnet remains unreachable.
Incorrect Answers
VPN firewall policies and source nat exemptions (5.1) addresses another technical failure: Translating local private addresses unexpectedly may cause remote VPN selectors or application allowlists to reject traffic. This case instead tests IPsec phase-two traffic selector agreement; the choice measures or changes another part of the system.
IPsec tunnel logging and diagnosis (5.1) would demonstrate or implement: Treating all IPsec connectivity faults as cryptographic problems can cause unnecessary key or proposal changes. The required paired action and test concerns IPsec phase-two traffic selector agreement; a passing result for this alternative could leave that requirement unresolved.
IPsec peer and routing recovery after failover (5.1) would demonstrate or implement: A controlled HA/WAN failover re-establishes encrypted connectivity and application flows through approved paths. The paired-answer requirement concerns IPsec phase-two traffic selector agreement; this alternative does not provide the matching intervention and separate acceptance evidence.