Using a pin in the reset hole (adjacent to the console port) you can operate the reset button.
Press the reset button for between 1 and 5 seconds and release. The FireBrick will do an immediate hardware restart using the existing configuration. This does not shut down BGP etc.
A controlled reset can be done from the web interface, or via the CLI (telnet or the console port).
Press and hold the reset button for at least 5 seconds - the LEDs light up blue left to right to time the 5 seconds for you. When all LEDs show, release the reset button and the FireBrick will restart.
This will start the FireBrick in a temporary factory reset configuration. Follow the instructions in Chapter 2 to connect via the web interface or CLI.