Best of Tech Support

Our experts answer your technical questions.
Ethernet Masked Ball

I would like to be able to modify the MAC ID of my Ethernet card in much the same way I can with my Linksys router. Is there an easy way to do this?

—Mike O'Doherty,

You didn't specify which Ethernet card you have; some allow this, while others do not. If your card does allow this, you can use ifconfig as follows:

ifconfig eth0 hw ether 001122334455

For those using cable or DSL modems, note that this is a useful trick if you have set up your service using a Windows box and want to install a Linux firewall/gateway. Most providers track the MAC address of the workstation's Ethernet card and can be hard to deal with if this changes. With the above command, you can force your Linux gateway to have the same MAC address as your original client system.

—Chad Robinson,

Touch Me, It's So Easy to Leave Me...

What is the required XF86Config-4 setup to use a Dynapro (3M) touchscreen? Do I need to enable it with something similar to xsetpointer NFI3 after X starts?

—Shane Kennedy,

You can find updated drivers for 3M (formerly Dynapro) touchscreens at

—Robert Connoy,