Timothy Murphy: >>> Some program re-writes /etc/sysconfig/network-scripts/ifcfg-eth? >>> when I re-boot. Matthew Saltzman: > I don't think the DHCP client changes anything in > /etc/sysconfig/ifcfg-eth0. It may set the contents of /etc/resolv.conf. I just had another look at this. There is no /etc/sysconfig/ifcfg-eth0 file, do you have something extra? # locate ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/networking/devices/ifcfg-eth0 /etc/sysconfig/networking/profiles/default/ifcfg-eth0 They're all the same: # Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ DEVICE=eth0 BOOTPROTO=dhcp HWADDR=00:02:44:70:81:A8 ONBOOT=yes DHCP_HOSTNAME=serge TYPE=Ethernet USERCTL=no IPV6INIT=no PEERDNS=yes This box does use DHCP to set the IP address, and all those files have a file date from last December. I can never remember how to tell, but I seem to recall reading that they're all the same file, two of them are links to the other. Thinking more about the original poster's question, I'm wondering if they have kudzu running each bootup, and whether it does it. -- (This box runs FC6, my others run FC4 & FC5, in case that's important to the thread.) Don't send private replies to my address, the mailbox is ignored. I read messages from the public lists.