Question 660
A new server cannot reach an upstream API although FortiGate's own ping succeeds; the incident requires a client-source packet trace rather than treating control-plane tests as proof. Which FortiOS 7.6 configuration or corrective action is MOST appropriate?
Explanation
Correct Answer
Trace a permitted test flow using FortiOS interface status, routing tables, packet sniffers, session tables and narrowly scoped debug flow, then stop diagnostics safely. This directly addresses the FortiOS configuration or response required by the case. A ping from the FortiGate control plane may use a different source and route than user traffic; overbroad live debug capture can also expose sensitive packets or strain production. Verify with: Check link speed and duplex, ARP entries, ingress and egress interfaces, route choice, debug-flow policy messages, packet captures and session flags. Scenario: A new server cannot reach an upstream API although FortiGate's own ping succeeds; the incident requires a client-source packet trace rather than treating control-plane tests as proof.
Incorrect Answers
Deploy supported FortiGate-VM interfaces, cloud route tables and security controls so inspected application traffic actually traverses the intended firewall path. This addresses FortiGate VM in public-cloud route and interface topology, but not the principal task of the described flow. FortiGate VM policies cannot inspect packets that cloud-native route tables never send to it, and cloud security groups remain separate enforcement layers. The better fit is: Trace a permitted test flow using FortiOS interface status, routing tables, packet sniffers, session tables and narrowly scoped debug flow, then stop diagnostics safely. Scenario: A new server cannot reach an upstream API although FortiGate's own ping succeeds; the incident requires a client-source packet trace rather than treating control-plane tests as proof.
Enable and validate supported FGCP session synchronization and session-pickup behavior appropriate to traffic type and device capability, with realistic application failover exercises. This addresses HA session-pickup and failover continuity, but not the principal task of the described flow. HA configuration synchronization does not imply every TCP, UDP or proxy inspection session will survive unchanged; session pickup has platform and feature limitations. The better fit is: Trace a permitted test flow using FortiOS interface status, routing tables, packet sniffers, session tables and narrowly scoped debug flow, then stop diagnostics safely. Scenario: A new server cannot reach an upstream API although FortiGate's own ping succeeds; the incident requires a client-source packet trace rather than treating control-plane tests as proof.
Use FortiOS process and resource diagnostics to isolate sustained CPU load, distinguishing normal packet processing from logging, security scanning or runaway control-plane tasks. This addresses CPU process health and abnormal-load troubleshooting, but not the principal task of the described flow. A high CPU percentage cannot by itself identify a failing security module; FortiOS hardware offload and device model affect the meaning of process and throughput measurements. The better fit is: Trace a permitted test flow using FortiOS interface status, routing tables, packet sniffers, session tables and narrowly scoped debug flow, then stop diagnostics safely. Scenario: A new server cannot reach an upstream API although FortiGate's own ping succeeds; the incident requires a client-source packet trace rather than treating control-plane tests as proof.