Refer to the exhibit, which contains the output of a debug command. If the default settings are in place, what can you conclude about the conserve mode shown in the exhibit?
A.
FortiGate is currently blocking new sessions that require flow-based or proxy-based content inspection.
B.
FortiGate is currently blocking all new sessions regardless of the content inspection requirements or configuration settings because of high memory use.
C.
FortiGate is currently allowing new sessions that require flow-based or proxy-based content inspection but is not performing inspection on those sessions.
D.
FortiGate is currently allowing new sessions that require flow-based content inspection and blocking sessions that require proxy-based content inspection.
I believe it is actually D, because the default fail-open behavior for flow inspection which is configured under IPS settings is to drop all new sessions that require inspection. For proxy inspection mode new sessions are allowed with out inspection by default. So D is the correct behavior for each.
https://docs.fortinet.com/document/fortigate/7.2.9/administration-guide/194558/conserve-mode
• FortiGate does not accept configuration changes because they might increase memory usage.
• FortiGate does not run any quarantine action, including forwarding suspicious files to FortiSandbox.
• FortiGate applies the action defined in the av-failopen setting to any proxy-based inspected traffic
off: All new sessions with content scanning enabled are not passed but FortiGate processes the current active sessions.
pass (default): All new sessions pass without inspection until FortiGate switches back to non-conserve mode.
one-shot: Similar to pass in that traffic passes without inspection. However, it will keep bypassing the antivirus proxy even after it leaves conserve mode.
Default setting conserve mode (Red): All new sessions pass without inspection until Fortigate switches back to non-conserve mode. However, if memory usage exceeds the extreme threshold, new sessions are always dropped regardless of the configuration. The exhibit shows the unit in Red threshold.
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