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Recovering the Root Password for NFX250

The root password helps to prevent unauthorized users from making changes to your network. If you forget the root password, you can use the password recovery procedure to reset the root password.


You can recover the root password only if the password recovery option is enabled. To enable password recovery, use the following commands:

You need console access to the device to recover the root password.

To recover the root password:

  1. Power off the device by switching off the AC power outlet of the device. Or, if necessary, pull the power cords out of the device’s power supplies.
  2. Plug one end of the Ethernet rollover cable supplied with the device into the RJ-45-to-DB-9 serial port adapter supplied with the device.
  3. Plug the RJ-45-to-DB-9 serial port adapter into the serial port on the management device.
  4. Connect the other end of the Ethernet rollover cable to the console port on the device.
  5. On the management device, start any asynchronous terminal emulation application (such as Microsoft Windows HyperTerminal), and select the appropriate COM port to use (for example, COM1).
  6. Configure the port settings as follows:
    • Bits per second—9600

    • Data bits—8

    • Parity—None

    • Stop bits—1

    • Flow control—None

  7. Power on the NFX250 by switching on the AC power outlet the device is plugged into. Or, if necessary, power it on by plugging the power cords into the device's power supply.

    The terminal emulation screen on your management device displays the device’s boot sequence.

  8. When the system prompts you to press the Esc key, start pressing the Down Arrow key.
  9. Continue to press the Down Arrow key until you see the following output. Select Juniper Linux - Debug.
  10. Press the Enter key until you see the following message on your screen. Select Reset JDM root password.
  11. Enter the new password and reboot the device.

    After the device reboots, you can login with the new password.