"SF" == Sun Fulong <sfl at neusoft.edu.cn> SF> As I know, fedoraproject have a special system, that I can SF> set which IPs will use my mirror, and eclipse.org will use SF> reverse DNS query to show my mirror as preferred server, SF> how does centos.org do it? At the moment, if you want to ensure that you use your local mirror, you need to edit the .repo files in /etc/yum.repos.d to change baseurl to point specifically to your repository (and comment out the mirrorlist line). Otherwise, YUM gets a list of random mirrors in your country, which may still be very far away. Claire *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Claire M. Connelly cmc at math.hmc.edu System Administrator, Dept. of Mathematics, Harvey Mudd College *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*