Disable Ethernet Ports on My Linux cRIO Controller

Updated Apr 1, 2024



  • cRIO-9035
  • cRIO-9038


  • LabVIEW Real-Time Module

I'd like to disable both of my Ethernet ports on my cRIO for security reasons. I can only disable my second Ethernet port.  How do I make sure I have both ports disabled?

Additional Information

One consideration you have to keep in mind is that the changes don't survive after a reboot.

We can disable the ports on the CompactRIO with the same method that we use to disable Ethernet cards on a Linux Desktop. This is using the "ifconfig" command in the Terminal.
  1. Open NI-MAX on another computer and navigate to your cRIO. 
  2. Under System Settings, click the box next to "Enable Embedded UI".  You will now be able to connect a keyboard to your cRIO's USB port and access the Linux Command Line.
  3. Access the terminal as an admin and run the following commands:
>> ifconfig ethX up
>> ifconfig ethX down
Replace "X" with 0 or 1 to designate which port you'd like to change.  "up" and "down" enable and disable the Ethernet ports.