linode主机yum安装出现Error: Cannot retrieve repository metadata (repomd.xml) for repository

[code]Loaded plugins: fastestmirror
Setting up Install Process
Determining fastest mirrors
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=os&infra=stock error was
14: PYCURL ERROR 6 – “Couldn’t resolve host ‘mirrorlist.centos.org'”
^CCould not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=extras&infra=stock error was
14: PYCURL ERROR 6 – “Couldn’t resolve host ‘mirrorlist.centos.org'”
Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=6&arch=x86_64&repo=updates&infra=stock error was
14: PYCURL ERROR 6 – “Couldn’t resolve host ‘mirrorlist.centos.org'”
http://mirrors.linode.com/centos/6/os/x86_64/repodata/repomd.xml: [Errno 14] PYCURL ERROR 6 – “Couldn’t resolve host ‘mirrors.linode.com'”
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: base. Please verify its path and try again
[/code]

解决方案：

我cao，是不是iptables规则设置错了！ 关掉试试！