Question 730
A FortiOS 7.6 team examines: An operator permits every service over the VPN to fix one business application timeout. Select TWO complementary choices: the most appropriate corrective action AND the specific evidence confirming success.
Explanation
Correct Answers
For the observed situation (An operator permits every service over the VPN to fix one business application timeout), the most specific acceptance evidence is: Protected hosts see approved original source networks and tests show firewall permits only the required services. It validates the recommended response: Create least-privilege firewall rules for approved IPsec source and destination networks and avoid unintended source NAT across the protected path. This addresses the documented risk: Translating local private addresses unexpectedly may cause remote VPN selectors or application allowlists to reject traffic.
The reported FortiOS 7.6 condition is: An operator permits every service over the VPN to fix one business application timeout. The targeted administrative response is: Create least-privilege firewall rules for approved IPsec source and destination networks and avoid unintended source NAT across the protected path. The relevant failure risk is: Translating local private addresses unexpectedly may cause remote VPN selectors or application allowlists to reject traffic. Validate with: Protected hosts see approved original source networks and tests show firewall permits only the required services.
Incorrect Answers
IPsec phase-two traffic selector agreement (5.1) would demonstrate or implement: The intended child security association forms and bidirectional traffic between the approved networks succeeds. The case states: the most appropriate corrective action AND the specific evidence confirming success. The most direct paired action and test is: Protected hosts see approved original source networks and tests show firewall permits only the required services.
IPsec anti-replay and time-drift troubleshooting (5.1) would demonstrate or implement: Large traffic reordering or stale security association state can cause legitimate encrypted packets to be discarded. This choice can be useful for that problem, but it does not establish the VPN firewall policies and source nat exemptions control being assessed here.
VPN hub-and-spoke versus partial mesh topology (5.1) addresses another technical failure: Assuming spoke-to-spoke reachability in a pure hub model without appropriate routes and policies can blackhole traffic. The required paired action and test concerns VPN firewall policies and source nat exemptions; a passing result for this alternative could leave that requirement unresolved.