[CentOS] OT: centos.org web site not responding

Rainer Duffner rainer at ultra-secure.de
Fri Mar 20 18:59:44 UTC 2009


Lanny Marcus schrieb:
> On 3/20/09, Lanny Marcus <lmmailinglists at gmail.com> wrote:
>   
>> 2009/3/20 Tru Huynh <tru at centos.org>:
>>     
>>> On Fri, Mar 20, 2009 at 11:02:46AM -0500, Lanny Marcus wrote:
>>>       
>>>> ae_cw_10g.databank.com                        0.0% 111.6 113.6 110.7
>>>> 126.5   4.8
>>>> pod22h_ae.layeredtech.com                     0.0% 116.8 115.5 110.7
>>>> 139.7   8.7
>>>> ???                                          100.0   0.0   0.0   0.0
>>>> 0.0   0.0
>>>> 162.194.232.72.static.reverse.ltdomains.com  10.0% 111.4 117.4 110.9
>>>> 140.3   9.8
>>>> [root at dell2400 ~]#
>>>>
>>>>         
>>>>> So, from this point of view, L3 seems to be losing >some packets.
>>>>>           
>>>> At the end, when I ran the mtr command you used, ??? is losing 100% at
>>>> one router within layered tech.com (the hop after
>>>> pod22h_ae.layeredtech.com)  and the next one,
>>>> 162.194.232.72.static.reverse.ltdomains.com is losing10%?
>>>>         
>>> 162.194.232.72.static.reverse.ltdomains.com is www.centos.org
>>>       
>> Tru: And it's losing 10%? There seems to be a larger problem, before
>> it gets to that server, within LT. If you read the last few messages
>> in this thread, posted this morning (GMT -5 here), by me, Rainer and
>> Per, the LT Tech should be able to track down the problem(s) within
>> their DC. Take care and thank you! Lanny
>>
>>     
> Tru: Until Rainer showed the command he used "mtr -c 10 -r centos.org"
> I was unaware of it, until this morning. Possibly the 10% loss at the
> server is OK? 


This can have a variety of reasons - packet-filtering is not the least
likely ;-)
I don't think centos.org is just sitting there with no iptables etc.

I can reach centos.org from my colo-box perfectly (via lynx) - but I'm
not sure why I would need 16 or 17 hops to do that - and even 20 for
layeredtech.com.
I can reach our own little website via 8 hops, same as yahoo.de

I should point out that I have no deeper insight into the inner workings
of how internet-routing works - maybe this is all expected.
But in the past, mtr was quite reliable pin-pointing severe problems.



Rainer


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