Installing firmware from system reboot

In the event that the firmware upgrade does not load properly and the FortiGate unit will not boot, or continuously reboots, it is best to perform a fresh install of the firmware from a reboot using the CLI. If configured, the firmware can also be automatically installed from a USB drive; see Restoring from a USB drive for details.

This procedure installs a firmware image and resets the FortiGate unit to factory default settings. You can use this procedure to upgrade to a new firmware version, revert to an older firmware version, or re-install the current firmware.

To use this procedure, you must connect to the CLI using the FortiGate console port and a RJ-45 to USB (or DB-9), or null modem cable. You must also install a TFTP server that you can connect to from the FortiGate internal interface. The TFTP server should be on the same subnet as the internal interface.

Before beginning this procedure, ensure that you backup the FortiGate unit configuration. See Configuration backups for details. If you are reverting to a previous FortiOS version, you might not be able to restore the previous configuration from the backup configuration file.

Installing firmware replaces your current antivirus and attack definitions, along with the definitions included with the firmware release you are installing. After you install new firmware, make sure that antivirus and attack definitions are up to date.

To install firmware from a system reboot:
  1. Connect to the CLI using the RJ-45 to USB (or DB-9) or null modem cable.
  2. Ensure that the TFTP server is running.
  3. Copy the new firmware image file to the root directory of the TFTP server.
  4. Ensure that the FortiGate unit can connect to the TFTP server using the execute ping command.

  5. Restart the FortiGate unit: execute reboot. The following message is shown:

    This operation will reboot the system!

    Do you want to continue? (y/n)

  6. Type y. As the FortiGate unit starts, a series of system startup messages appears.
  7. When the following messages appears:

    Press any key to display configuration menu..........

    Immediately press any key to interrupt the system startup.

    You have only three seconds to press any key. If you do not press