http://rhel.ieesee.net/uingei/
http://zs.kan115.com:8080/rhel-server-6.0-x86_64-dvd.iso
http://www.redhat.com/rhel/beta/
http://archive.download.redhat.com/pub/redhat/linux/
http://zs.kan115.com:8080/rhel-server-6.0-x86_64-dvd.iso
ftp://ftp.redhat.com/pub/redhat/rhel/beta/6/x86_64/iso/
http://www.verycd.com/topics/2863829/