Question 710
An administrator enables antivirus on a policy but users download malware over encrypted HTTPS while only certificate inspection is enabled. Which FortiOS 7.6 configuration or corrective action is MOST appropriate?
Explanation
Correct Answer
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 directly addresses the FortiOS configuration or response required by the case. 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. Verify with: Check AV profile action, inspection mode, protocol handling, signature version, SSL inspection profile, matched policy and antivirus log. Scenario: An administrator enables antivirus on a policy but users download malware over encrypted HTTPS while only certificate inspection is enabled.
Incorrect Answers
Validate FortiGuard AV updates and correlate malware detection logs to specific profiles and quarantines, applying safe containment rather than relying on a stale signature database. This addresses FortiGuard antivirus signature freshness and incident response, but not the principal task of the described flow. Antivirus effectiveness depends on inspection visibility and current definitions, and an allow action on a profile can still report detections without blocking them. The better fit is: Apply FortiOS antivirus profiles and protocol options in the supported inspection mode on the relevant firewall policies, with suitable FortiGuard definitions and HTTPS visibility. Scenario: An administrator enables antivirus on a policy but users download malware over encrypted HTTPS while only certificate inspection is enabled.
Choose FortiOS DNS filtering or web filtering controls based on the traffic path and available request metadata, verifying that protected clients actually use the intended DNS resolver. This addresses DNS filtering versus web filtering visibility boundaries, but not the principal task of the described flow. DNS filtering acts on DNS lookups, not arbitrary HTTP URL paths or already established IP connections, and encrypted DNS may bypass poorly placed resolver controls. The better fit is: Apply FortiOS antivirus profiles and protocol options in the supported inspection mode on the relevant firewall policies, with suitable FortiGuard definitions and HTTPS visibility. Scenario: An administrator enables antivirus on a policy but users download malware over encrypted HTTPS while only certificate inspection is enabled.
Attach a current FortiGate application control profile to the correct matching firewall policy and assess SSL inspection requirements for applications that use encrypted or unusual ports. This addresses Application control signature matching and required visibility, but not the principal task of the described flow. Application detection is not identical to TCP service-port matching; encrypted or evasive traffic can require additional visibility and signature coverage. The better fit is: Apply FortiOS antivirus profiles and protocol options in the supported inspection mode on the relevant firewall policies, with suitable FortiGuard definitions and HTTPS visibility. Scenario: An administrator enables antivirus on a policy but users download malware over encrypted HTTPS while only certificate inspection is enabled.