Question 810
At Kingsford University, the FortiGate 7.6 security administration team encounters the following authorized operational case: AV detects malicious content over HTTP but misses the same harmless test signature carried inside HTTPS under certificate-only inspection. They need a defensible FortiOS configuration, diagnosis, validation or prevention decision. What root condition most directly explains the described FortiGate symptom?
Explanation
Correct Answer
Encrypted HTTPS payloads are not available to the AV engine under certificate metadata-only inspection. The mechanism is relevant because the stated antivirus https payload visibility incident concerns the actual selected path, policy, identity or inspection state. The appropriate response is to enable permitted supported SSL deep inspection for flows that must undergo HTTPS payload antivirus scanning; verify it through this observed condition: a supervised HTTPS harmless test-file download triggers the required AV result.
Incorrect Answers
Exploit detection depends on both enabled sensor selection and current applicable signatures explains a different situation, ips signature update availability, where a current known vulnerability test is not matched because the FortiGate IPS database has an old update timestamp. It does not account for the specific observed antivirus https payload visibility condition at Kingsford University. The decisive mechanism here is: Encrypted HTTPS payloads are not available to the AV engine under certificate metadata-only inspection.
A filter may include multiple signatures even when one explicit override is changed explains a different situation, ips filter versus individual override, where an administrator modifies a single IPS signature action but the broad sensor filter still blocks unrelated events. It does not account for the specific observed antivirus https payload visibility condition at Kingsford University. The decisive mechanism here is: Encrypted HTTPS payloads are not available to the AV engine under certificate metadata-only inspection.
An IPS signature match does not demonstrate prevention unless its effective action blocked the session explains a different situation, ips detection versus prevention reporting, where a weekly report counts every IPS alert as a prevented attack even though many rules are set to monitor. It does not account for the specific observed antivirus https payload visibility condition at Kingsford University. The decisive mechanism here is: Encrypted HTTPS payloads are not available to the AV engine under certificate metadata-only inspection.