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> Chapter 23 - System Administration > Firmware > Reverting to a previous firmware version - web-based manager

Reverting to a previous firmware version - web-based manager

The following procedures revert the FortiGate unit to its factory default configuration and deletes any configuration settings. If you are reverting to a previous FortiOS version, you might not be able to restore the previous configuration from the backup configuration file.

Always remember to back up your configuration before making any changes to the firmware.
To revert to a previous firmware version
  1. Go to System > Dashboard > Status and locate the System Information widget.
  2. Beside Firmware Version, select Update.
  3. Type the path and filename of the firmware image file, or select Browse and locate the file.
  4. Select OK.

The FortiGate unit uploads the firmware image file, reverts to the old firmware version, resets the configuration, restarts, and displays the FortiGate login. This process takes a few minutes.