Question 80
A security architect enables every IPS signature on a sensitive OT segment without testing false-positive and latency impacts on legacy industrial protocols. Which FortiOS 7.6 configuration or corrective action is MOST appropriate?
Explanation
Correct Answer
Build a FortiGate intrusion prevention sensor using supported signature filters, action overrides and protected-application context, then attach it to the correct policy. This directly addresses the FortiOS configuration or response required by the case. Signature severity alone does not guarantee relevance; a disabled or monitor-only IPS rule may log threats without blocking, and encrypted payloads need appropriate inspection. Verify with: Inspect IPS sensor filter severity/category, signature IDs, action selection, policy assignment, SSL visibility and actual IPS event logs. Scenario: A security architect enables every IPS signature on a sensitive OT segment without testing false-positive and latency impacts on legacy industrial protocols.
Incorrect Answers
Apply FortiOS antivirus profiles and protocol options in the supported inspection mode on the relevant firewall policies, with suitable FortiGuard definitions and HTTPS visibility. This addresses Antivirus profile scanning modes and supported protocol boundaries, but not the principal task of the described flow. An antivirus profile can only scan content visible in its inspection path and within supported protocol or size limits; a scanner configured but unattached is ineffective. The better fit is: Build a FortiGate intrusion prevention sensor using supported signature filters, action overrides and protected-application context, then attach it to the correct policy. Scenario: A security architect enables every IPS signature on a sensitive OT segment without testing false-positive and latency impacts on legacy industrial protocols.
Apply narrowly scoped, auditable SSL-inspection exclusions for supported certificate-pinned or regulated applications without disabling inspection for every other destination. This addresses Targeted SSL inspection exclusions and privacy controls, but not the principal task of the described flow. Broad category-level SSL exemptions can create large visibility gaps; an exception should be limited to the actual affected flow and justified by policy. The better fit is: Build a FortiGate intrusion prevention sensor using supported signature filters, action overrides and protected-application context, then attach it to the correct policy. Scenario: A security architect enables every IPS signature on a sensitive OT segment without testing false-positive and latency impacts on legacy industrial protocols.
Measure FortiOS IPS engine and appliance resource load under representative traffic before changing signature sets or SSL inspection scope, keeping protection while isolating bottlenecks. This addresses IPS process CPU demand and inspection capacity, but not the principal task of the described flow. An IPS workload may be CPU-bound on a particular model or traffic mix, and disabling all sensors is not a diagnosis of the expensive signature or protocol path. The better fit is: Build a FortiGate intrusion prevention sensor using supported signature filters, action overrides and protected-application context, then attach it to the correct policy. Scenario: A security architect enables every IPS signature on a sensitive OT segment without testing false-positive and latency impacts on legacy industrial protocols.