1) Connect to the Unified Firewall via the CLI and enter the command sudo -i to gain administrative rights. Acknowledge the prompt by entering the password of the user gpadmin.
2) Enter the command update_firmware -b to update the BIOS.
During the update process the Unified Firewall must not be disconnected from power or be restarted. Otherwise this could lead to the device not functioning properly afterwards!
3) After the successful BIOS update a corresponding message is displayed. The Unified Firewall will automatically reboot afterwards.