It looks like dhcpd is broken due to a compiler bug: https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=144250 From what the bug report says, a recompile with gcc-3.4.3-2 or newer should do the trick, but I tied with the current version gcc-3.4.3-9.EL4 it did not work. I looked at CENTOS4 and it looks like they have recompiled it under CENTOS3 to make it work. Gerald