FortiGate Firewall Restore
Restoring from a USB drive -Flash format and USB firmware load
Automatic installation of Firmware and system configuration
Fortigate auto USB installation


The FortiGate firmware can be manually restored from a USB drive,
or installed automatically from a USB drive after a reboot.

To restore the firmware from a USB drive

  1. Copy the firmware file to the root directory on the USB drive.
  2. Connect the USB drive to the USB port of the FortiGate device.
  3. Connect to the FortiGate CLI using the RJ-45 to USB (or DB-9) or null modem cable.

Enter the following command:

execute restore image usb filename
The FortiGate unit responds with the following message:

This operation will replace the current firmware version! Do you want to continue? (y/n)
Type y.

The FortiGate unit restores the firmware and restarts.
This process takes a few minutes.