I had my Knoppix box up and running just fine, then shut the machine off and went on vacation for a few days. When I came home and turned it back on, it would not see my network, always comes up with that default IP address of 169.254.103.69 that a card gets if it is all alone in the world.

Now, booting from the Knoppix CD, I can connect just fine, so the hardware isn't the problem.

I haven't changed anything that I know of, but no combination of changes to /etc/networking/interfaces or other config files has helped.

I like to run this box with a fixed IP, but setting it to use static or dhcp I get the same result.

I'm not sure how to diagnose it or what tools to use to try to figure it out. I haven't done much with this machine since I built it, so I could consider a reinstall, but I'd really rather not.

How can I figure out what's wrong?

Posting config info and stuff will be sort of tough since the thing is offline, but I can reboot from the CD and copy the files at least.

Thanks in advance...