Question 650
At Ironwood University, the FortiGate 7.6 security administration team encounters the following authorized operational case: a team attempts to use a proxy-only web filtering feature on a flow-based FortiGate policy. They need a defensible FortiOS configuration, diagnosis, validation or prevention decision. What root condition most directly explains the described FortiGate symptom?
Explanation
Correct Answer
Some web filter controls depend on the inspection engine and cannot be enabled identically in flow mode. The mechanism is relevant because the stated flow mode web filter feature availability incident concerns the actual selected path, policy, identity or inspection state. The appropriate response is to choose a supported proxy inspection mode and matching profile where that feature is required; verify it through this observed condition: a controlled URL receives the proxy-only verdict without unsupported profile errors.
Incorrect Answers
Encryption conceals application protocol details beyond what the selected certificate inspection can observe explains a different situation, encrypted application signature visibility, where application-control signatures detect a service on HTTP but cannot distinguish its encrypted application features under certificate-only inspection. It does not account for the specific observed flow mode web filter feature availability condition at Ironwood University. The decisive mechanism here is: Some web filter controls depend on the inspection engine and cannot be enabled identically in flow mode.
An application may be terminated at inspection and produce security events different from successful traffic-session records explains a different situation, application control deny with no traffic log, where a denied file-transfer program is visible in application security events but the help desk expects a matching normal accepted-session log. It does not account for the specific observed flow mode web filter feature availability condition at Ironwood University. The decisive mechanism here is: Some web filter controls depend on the inspection engine and cannot be enabled identically in flow mode.
Nested archive inspection is constrained by configured decompression and recursion thresholds explains a different situation, archive recursion scanning, where a nested compressed attachment passes a firewall because the configured antivirus archive depth is too low. It does not account for the specific observed flow mode web filter feature availability condition at Ironwood University. The decisive mechanism here is: Some web filter controls depend on the inspection engine and cannot be enabled identically in flow mode.