I have a broadband connection using a USB port, I'm a newbie but I think the module that drives this device is called 'CDCEther' and you can make sure it is loaded with 'modprobe CDCEther' - from the 'Root shell' (Knoppix menu).

Then type 'netcardconfig' and it should show two ports, your onboard ethernet (eth0) and a second one, your USB connection - eth1 - either choose DHCP or enter the correct settings (your ISP will have given you those).

If any of this is wrong - can someone else help this chap!

Stu.....