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

Fri Mar 1 12:57:26 UTC 2013
Ljubomir Ljubojevic <centos at plnet.rs>

On 03/01/2013 02:09 AM, Rock wrote:
> On Fri, 01 Mar 2013 09:01:03 +1100, Kahlil Hodgson wrote:
>
>> Do you always have the same number of hops?  Wondering if the WISPs you
>> bounce through might change.  Perhaps one of those is problematic.
> Dunno the exact number of hops but it's always long
> but I only have 1 WISP so I don't have a choice.
>
> It goes from my laptop to my home broadband router to my
> radio & antenna on the roof to the WISP antenna and at that point
> it bounces a while within the WISP's network before exiting on
> some backbone on it's merry way to centos.
>
> The ONE STOP prior to centos.org is the last stop; but all other
> web sites work. So, my "assumption" is that Centos.org is blocking
> me. I didn't think about this when I first posted this thread,
> but then someone told me that they ran a traceroute and there was
> only ONE STOP after where it stopped for me, so, that's when the
> light bulb lit.
>
> Now, as to WHY they're blocking me - that I asked their webmaster
> by mail, earlier today.
>
>> You could try checking something like
>> 	http://multirbl.valli.org/
> Nice site. I see blacklists, whitelists, Yellowlists, neutralized,
> and even not listed as reports, and ALL (even the not listed) came
> up with zero.
>
>

It is worth noting that www.centos.org was inaccessible from Serbia and 
http://www.downforeveryoneorjustme.com/centos.org on 27.01.2013 around 
16:30, for about 1-2 hours.