Question 870
An AV scanning rule blocks all large uploads needed for an approved backup workflow and the team attempts to fix it with a broad any-any policy rather than a scoped exception. Which FortiOS 7.6 configuration or corrective action is MOST appropriate?
Explanation
Correct Answer
Set supported protocol and file-size inspection thresholds according to policy, explicitly handling oversized, compressed or unsupported transfers without silently failing open. This directly addresses the FortiOS configuration or response required by the case. An allowed oversize bypass can create a malware scanning gap even though the AV profile is enabled for smaller files; archive depth changes effective inspection capability. Verify with: Inspect antivirus profile oversize behavior, archive nesting limits, stream/proxy mode, protocol options, log action and representative file-size tests. Scenario: An AV scanning rule blocks all large uploads needed for an approved backup workflow and the team attempts to fix it with a broad any-any policy rather than a scoped exception.
Incorrect Answers
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: Set supported protocol and file-size inspection thresholds according to policy, explicitly handling oversized, compressed or unsupported transfers without silently failing open. Scenario: An AV scanning rule blocks all large uploads needed for an approved backup workflow and the team attempts to fix it with a broad any-any policy rather than a scoped exception.
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: Set supported protocol and file-size inspection thresholds according to policy, explicitly handling oversized, compressed or unsupported transfers without silently failing open. Scenario: An AV scanning rule blocks all large uploads needed for an approved backup workflow and the team attempts to fix it with a broad any-any policy rather than a scoped exception.
Verify that security policies for TLS downloads use appropriate deep inspection, antivirus scanning and certificate handling, restricting bypasses to narrowly documented incompatible services. This addresses HTTPS malware scanning with controlled exception validation, but not the principal task of the described flow. FortiGate cannot content-scan encrypted HTTP payload merely because a web category or trusted certificate is visible; indiscriminate TLS decryption may break pinned clients. The better fit is: Set supported protocol and file-size inspection thresholds according to policy, explicitly handling oversized, compressed or unsupported transfers without silently failing open. Scenario: An AV scanning rule blocks all large uploads needed for an approved backup workflow and the team attempts to fix it with a broad any-any policy rather than a scoped exception.