Find out any active ethernet adapter and disable it

[ruihere]

Hi,

I try to disable any usb, usb-c, or other ways of ethernet and temperately disable it. let wifi run. and then reactive when I finish my script.

any way to find out active ethernet adapter and disable it?

thanks!

[tthurman]

I think this is going to be rather tricky. Primarily because it seems that each new adapter creates a new service.

Do you need to actually disable it? Can you just change the service order?

Regards
TJ

[tthurman]

However, if you need to do it.

What you're probably looking for is:
sudo networksetup -listallnetworkservices
sudo networksetup -setnetworkserviceenabled

example: sudo networksetup -setnetworkservice "Belkin USB-C LAN" off

[ruihere · Accepted solution]

but even just change the service order, you need to know the name for the adapter?

actually I just found out how to do it:

a=$(networksetup -listnetworkserviceorder |grep 'Hardware Port' |grep '10/100' |grep -o '....$' |cut -c 1-3)
sudo ifconfig $a down

and later when I want it back, I use
sudo ifconfig $a up

maybe this long command can be simplify :)

[ruihere]

@tthurman we are thinking on the same route! haha

[shigeru_okamoto]

With the newer version of macOS, you might have to change '10/100' to 'Ethernet' to have the script work.