As you've figured, FortiOS logs an Event Log-entry to notify
administrators what happened (alongside the GUI notification). The Event
Log-entry is listed under ID 0100020212, and includes Message "Unsafe
reboot may have caused inconsistency in disk d...
Imagine that you have a Guest WiFi running on port2 and a WAN port with
1.2.3.0/28. Preferably, you'll want to seperate this guest network as
much as possible from your office automation network on port1. This
means that you don't configure the DHCP ...