Always shut down the FortiGate operating system properly before turning off the power switch to avoid potentially catastrophic hardware problems.
To power off the FortiGate unit – web-based manager:
1. Go to System > Status.
2. In the System Resources widget, select Shutdown.
To power off the FortiGate unit – CLI: execute shutdown
Once this has been done, you can safely turn off the power switch or disconnect the power cables from the power supply.
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