I lately switched from knoppix 4 to knoppix 5 and, prior to installing it on my hard drive, I configured eth0 with dhcp on the local network while running on the live CD.
Now, when booting from HDD, eth0 is configured if I am connected to the very same network I was connected to during the installation. When connected to any other dhcp network not only eth0 is not up, but netcardconfig does not work either. I have to manually give a static IP (ifconfig) and a default router (route add default gw ...) to get eth0 working.
/etc/network/interfaces looks correct
/etc/network/ifstate is replaced by /etc/network/ifstate.hotplug but I hadn't checked if it was already so when running a Debain comig from knoppix 4
So how does my Debian know what its first local network was? Is there a place where the orginal dhcp server could be 'hard-wired'?