FortiGate configurations are stored in a binary format. When the device reboots with new firmware, a script runs to convert the old configuration syntax to the new syntax. This is why . If the conversion script encounters a syntax it can't handle (often due to deprecated features), the device might default to factory settings to preserve network reachability.
Click . This ensures a backup is made right before the process begins. fortigate firmware download install
: Always download a copy of your current configuration file. Go to Dashboard > System Information and select next to System Configuration. Verify Licensing FortiGate configurations are stored in a binary format