I have a Fedora 6/Ispconfig system that has been running perfectly for a long time now. It is on a network with several pc's and other servers. This morning we had no internet connectivity. I unplugged the Fedora computer from the switch and all traffic was restored, if I plug it back in, we lose all connectivity again. I have installed rkhunter and it said to check the /dev/.udev directory but I have no idea what I am looking for. Any ideas on where to start?