Quote Originally Posted by Stephen
open a console window becoming root with su and then netcardconfig alternatively edit the file /etc/network/interfaces and change the settings there to the correct ones then /etc/init.d/networking restart to restart the networking with the new settings. If it was the nameserver that you got wrong the file for that is /etc/resolv.conf.
I found "interfaces" in /etc/network and edited by hand... thanks for the other tips, for next time!