Yum源地址：
1、ftp://ftp.muug.mb.ca
2、http://yum.puppetlabs.com/
Centos的镜像地址：
为了节约有限的可用带宽，ISO图像不是从mirror.centos.org下载。
下面的镜像应该有ISO映像。
现在的区域：
http://mirrors.cn99.com/centos/6.9/isos/x86_64/
http://mirrors.zju.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.aliyun.com/centos/6.9/isos/x86_64/
http://mirrors.163.com/centos/6.9/isos/x86_64/
http://mirror.lzu.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.sohu.com/centos/6.9/isos/x86_64/
http://mirrors.shuosc.org/centos/6.9/isos/x86_64/
http://ftp.sjtu.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.tuna.tsinghua.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.nju.edu.cn/centos/6.9/isos/x86_64/
http://centos.ustc.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.btte.net/centos/6.9/isos/x86_64/
http://mirror.bit.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.neusoft.edu.cn/centos/6.9/isos/x86_64/
http://mirrors.nwsuaf.edu.cn/centos/6.9/isos/x86_64/
附近的区域：
http://ftp.yzu.edu.tw/Linux/CentOS/6.9/isos/x86_64/
http://ftp.tc.edu.tw/Linux/CentOS/6.9/isos/x86_64/
http://ftp.ksu.edu.tw/pub/CentOS/6.9/isos/x86_64/
http://ftp.twaren.net/Linux/CentOS/6.9/isos/x86_64/
http://ftp.isu.edu.tw/pub/Linux/CentOS/6.9/isos/x86_64/
http://ftp.stu.edu.tw/Linux/CentOS/6.9/isos/x86_64/
http://linux.cs.nctu.edu.tw/CentOS/6.9/isos/x86_64/
http://centos.mirror.cdnetworks.com/6.9/isos/x86_64/
http://data.nicehosting.co.kr/os/CentOS/6.9/isos/x86_64/
http://ftp.neowiz.com/centos/6.9/isos/x86_64/
http://ftp.daumkakao.com/centos/6.9/isos/x86_64/
http://mirror.navercorp.com/centos/6.9/isos/x86_64/
http://ftp.kaist.ac.kr/CentOS/6.9/isos/x86_64/
http://mirror.oasis.onnetcorp.com/centos/6.9/isos/x86_64/
http://mirror.vodien.com/centos/6.9/isos/x86_64/
http://mirror.nus.edu.sg/centos/6.9/isos/x86_64/
http://centos.usonyx.net/main/6.9/isos/x86_64/
http://mirror.0x.sg/centos/6.9/isos/x86_64/
http://mirror.qoxy.com/centos/6.9/isos/x86_64/
http://www.ftp.ne.jp/Linux/packages/CentOS/6.9/isos/x86_64/
http://ftp.iij.ad.jp/pub/linux/centos/6.9/isos/x86_64/
http://ftp.jaist.ac.jp/pub/Linux/CentOS/6.9/isos/x86_64/
http://ftp.tsukuba.wide.ad.jp/Linux/centos/6.9/isos/x86_64/
http://mirror.fairway.ne.jp/centos/6.9/isos/x86_64/
http://ftp.riken.jp/Linux/centos/6.9/isos/x86_64/
http://ftp.nara.wide.ad.jp/pub/Linux/centos/6.9/isos/x86_64/
http://ftp.yz.yamagata-u.ac.jp/pub/linux/centos/6.9/isos/x86_64/
http://mirror.awanti.com/centos/6.9/isos/x86_64/
http://ftp.nsc.ru/pub/centos/6.9/isos/x86_64/
http://mirror.yandex.ru/centos/6.9/isos/x86_64/
http://mirror.tversu.ru/centos/6.9/isos/x86_64/
http://centos-mirror.rbc.ru/pub/centos/6.9/isos/x86_64/
http://mirror.truenetwork.ru/centos/6.9/isos/x86_64/
http://mirror.corbina.net/pub/Linux/centos/6.9/isos/x86_64/
http://mirror.logol.ru/centos/6.9/isos/x86_64/
http://dedic.sh/centos/6.9/isos/x86_64/
http://mirror.maxus.pro/centos/6.9/isos/x86_64/
http://mirror.vilkam.ru/centos/6.9/isos/x86_64/
http://mirror.satellite-service.ru/centos/6.9/isos/x86_64/