Skip to content
Last update: 2022-05-24

Reimage Sophos Firewall

You can reimage hardware, virtual, and software appliances.


You use a bootable USB flash drive to reimage the device.


Reimaging deletes all the data on Sophos Firewall. Save a recent configuration backup.

Reimage Sophos Firewall

You can reimage Sophos Firewall with any firmware version.

Use a bootable USB flash drive and reimage the device.

  1. Download and burn an ISO image to a bootable USB flash drive.

    1. Go to Sophos Licensing Portal and sign in.
    2. Go to Network Protection > Download Installers and select the required hardware, virtual, or software installer.

      Select the installer to download

    3. Download balenaEtcher, a free tool to create a bootable USB flash drive.

    4. Run balenaEtcher and accept the license agreement.

      Accept the balenaEtcher agreement to use its tool to create a flash drive

    5. Insert a USB flash drive in your endpoint device. Select the firmware image you downloaded.


      The USB flash drive will be formatted. You'll lose all data on it.

      Select the firmware image

    6. Click Flash and wait for the tool to create a flash drive that can restart the firewall, and wait for validation.

      The balenaEtcher tool creates and validates a flash drive that can restart the firewall

      Process continues for creating the flash drive

      Validation process continues

      Created a flash drive that can restart the firewall

  2. To reimage Sophos Firewall, do the following:

    1. Power off Sophos Firewall.
    2. To monitor the installation, connect an SVGA monitor to the SVGA port of Sophos Firewall.

      If it doesn't have an SVGA port, use an LCD panel to monitor the installation.

    3. Insert the bootable USB flash drive you created in Sophos Firewall.

    4. Power on Sophos Firewall.
    5. To enter the BIOS, press the Delete key when Sophos Firewall is starting. Make sure USB Key is the first boot option in the BIOS.

      BIOS screen with USB key option

    6. Save and exit the BIOS.

      The firewall restarts.

      Save and then exit BIOS

    7. Sophos Firmware Installer starts reimaging Sophos Firewall.

      Reimaging Sophos Firewall

    8. Monitor the installation.

      Monitor the installation

    9. After the firmware is installed, remove the USB flash disk and type y to restart Sophos Firewall.

      Enter y on the command line to restart Sophos Firewall

    10. Sophos Firewall restarts with the default configuration.

      Enter the password after Sophos Firewall restarts

    11. Sign in and restore the configuration you want.

Back to top