Software Secure Firewall Threat Defense
Platform Secure Firewall Threat Defense Virtual
Activity Onboard

Onboard Devices to Cloud-Delivered Firewall Management Center Device Management Disable the USB Port Disable the USB Port in Multi-Instance Mode

Last updated: Jul 29, 2025

Disable the USB Port in Multi-Instance Mode

To disable the USB port in multi-instance mode, you can do so at the FXOS CLI.

Procedure

1

Disable the USB port and reboot for the change to take effect.

  1. Disable the USB port.

    scope fabric-interconnect

    disable usb-port

    commit buffer

  2. Reboot the chassis.

    connect local-mgmt

    reboot


firepower-4245 /fabric-interconnect # disable usb-port
Note: USB enablement or disablement changes are effected only after FXOS reboot.
Confirm change? (yes/no) [yes]:
device /fabric-interconnect* # commit buffer
Note: USB enablement or disablement changes are effected only after FXOS reboot.
Confirm change? (yes/no) [yes]:yes
firepower-4245 /fabric-interconnect # connect local-mgmt
firepower-4245(local-mgmt)# reboot
Before rebooting, please take a configuration backup.
Do you still want to reboot? (yes/no):yes
Broadcast message from admin@firepower-4245 (Wed Feb 21 05:59:55 2024):
All shells being terminated due to system /sbin/reboot
2

Enable the USB port and reboot for the change to take effect.

  1. Enable the USB port.

    scope fabric-interconnect

    enable usb-port

    commit buffer

  2. Reboot the chassis.

    connect local-mgmt

    reboot


firepower-4245 /fabric-interconnect # enable usb-port
Note: USB enablement or disablement changes are effected only after FXOS reboot.
Confirm change? (yes/no) [yes]:
device /fabric-interconnect* # commit buffer
Note: USB enablement or disablement changes are effected only after FXOS reboot.
Confirm change? (yes/no) [yes]:yes
firepower-4245 /fabric-interconnect # connect local-mgmt
firepower-4245(local-mgmt)# reboot
Before rebooting, please take a configuration backup.
Do you still want to reboot? (yes/no):yes
Broadcast message from admin@firepower-4245 (Wed Feb 21 05:59:55 2024):
All shells being terminated due to system /sbin/reboot
3

View the USB port status.

scope fabric-interconnect

show usb-port

The Admin State shows the USB port configuration. The Oper State shows the current operation. For example, if you disable the USB port but do not reload, the Admin State will show Disabled while the Oper State would will Enabled.


firepower-4245# scope fabric-interconnect
firepower-4245 /fabric-interconnect # show usb-port
Usb Port:
Equipment         Admin State Oper State
---------------- -----------  ----------
A                 Disabled    Disabled