Greetings, Are these still valid modprobe.conf for centos 5 ? alias net-pf-10 off alias ipv6 off Secondly, Are they still valid in centos 5 for the same reasons we put them in the modprobe.conf for centos 4 ? The centos wiki says yes. It used to be a "speedup" issue in centos 4 among other things if I recall correctly. What I don't understand is, if you turn off ipv6 on the NICs, why do we have to do this in modprobe.conf? Thank you in advance. - rh