Hi Billy, Sounds like you need to update the drivers for your network card to suit your updated kernel(s). I have to do this with my dial-up & wireless cards. I would probably use 'lspci -v' to find the chipset of your card and look around for updated kernel drivers. Hope this helps. Cheers, Tony > My problem arises when I upgrade my kernel to the latest >(2.6.15-1.1833_FC4), using either yum or up2date, wherein my machine > becomes unable to connect to other computers. > The Xircom card remains detected by the system under the new kernel. > I can ping the local machine, but not the others on the network, not > even the gateway machine. > When I boot up with the default kernel that came with the FC4 install > CDs, everything works again. It is only with the newer kernels that > my connectivity breaks.