[CentOS] What can I do to UNDERSTAND why I can't reach centos.org (but everyone else can)?

[Rock]

On Thu, 28 Feb 2013 16:56:44 -0600, Les Mikesell wrote:

> This seems to be a directory of those sites: http://www.lookinglass.org/

Thanks. I had never heard of this. 
Going there, it wasn't obvious what to do, so, I'll hunt and peck a bit.