uruknet.info
  اوروكنت.إنفو
    
    informazione dal medio oriente
    information from middle east
    المعلومات من الشرق الأوسط

[ home page] | [ tutte le notizie/all news ] | [ download banner] | [ ultimo aggiornamento/last update 25/04/2014 04:18 ] 40834


english italiano

  [ Subscribe our newsletter!   -   Iscriviti alla nostra newsletter! ]  




[40834]



Uruknet on Alexa


End Gaza Siege
End Gaza Siege

>

:: Segnala Uruknet agli amici. Clicka qui.
:: Invite your friends to Uruknet. Click here.




:: Segnalaci un articolo
:: Tell us of an article






ATTENTION: Iran is not disconnected!

Renesys Blog

February 4, 2008

Let me repeat, Iran is not disconnected from the Internet!

We have gotten a few queries about why we did not highlight Iran in our review of the network outages that resulted from the cable breaks. (See here, here and here.) Like most countries in the region, the outages in Iran were very significant, but for the most part they did not exceed 20% of their total number of networks. Now 20% is a significant loss, but in the context of an event where countries lost almost all of their connectivity, such a loss did not place Iran into the top 10 of impacted countries. So we focused most of our attention where the losses where the highest.

But then there was this Slashdot posting, claiming Iran had zero connectivity. This was news to us. It's said that "the first casualty of war is truth." Something similar can probably be said with regard to catastrophic failures. Truth might not be first, but it is a very close second. Journalists are pushed to meet deadlines for stories about topics for which they have little familiarity, and technical experts sometimes jump to conclusions on the basis of little evidence. It's not hard to see why the truth gets distorted; it's hard to think clearly when you believe the sky is falling.

The Slashdot claim was made since a web page at the Internet Traffic Report was reporting that the country was down. This report seems to be based on pings to a single router in Iran from multiple places around the world, which at best only indicates that one router in Iran is unavailable, not that the entire Internet has ceased to function there. Of course, once something ends up "in print", it tends to gain credibility and then be referenced by others. And before long, large numbers of people think it is actually true. (For a detailed ping analysis to the region during the outage, see this article.)

To understand what happened in Iran after the fiber cuts, we looked at actual routing data for the country, collected from around the globe. You can say with absolute certainty that if a provider does not have a route to any network in Iran, then no traffic will flow from that provider or its customers to Iran. But that is all you can say. The problem could be with the provider. That is why Renesys collects routes from a carefully selected set of peers around the world. If none of them know how to get to Iran, then you can be assured that Iran is truly off the air. Note that you have to be careful here with your selection of peers. If all of them end up traversing the same cable to get to Iran, even when other options exist, then the problem could be only with that cable and nothing more. To make a definitive statement about the worldwide reachability of any geography, you need to collect data from a diverse and at least somewhat independent set of peers so that you'll see all paths into the area. When the overwhelming majority of them have the same view of a situation, then you can conclude that the view is almost certainly correct for the entire world.

So back to Iran. In the following graph, we plotted the availability of Iranian networks for four entire days, 30 January 00:00 UTC until 3 February 00:00 UTC. The first day is the day of the cable cuts. Of the 695 networks that geo-locate to Iran, at no time were more than 199 unavailable, as observed by large number of Renesys peers. A few peers here and there might not have been able to reach Iran for local reasons, but the vast majority of the world could get to most of the networks in Iran for this entire time period. Note also that around 64 networks were unavailable before the event even started. These networks could be simply unused at this time. In other words, at most 135 networks that were active before the cable cuts disappeared for at least a short while during the outages.

Global Reachability of Iranian Networks

So much for Iran being off the Internet. Again, this is not to imply that Iran was not impacted by this event. A lot of networks were unavailable and some of them continue to be so. The end users of those networks are certainly noticing the problem and everyone in the country might be experiencing a slowdown due to the decrease in bandwidth to the region. Still, Iran fared much better than most.


:: Article nr. 40834 sent on 04-feb-2008 13:37 ECT

www.uruknet.info?p=40834

Link: www.renesys.com/blog/2008/02/attention_iran_is_not_disconne_1.shtml



:: The views expressed in this article are the sole responsibility of the author and do not necessarily reflect those of this website.

The section for the comments of our readers has been closed, because of many out-of-topics.
Now you can post your own comments into our Facebook page: www.facebook.com/uruknet





       
[ Printable version ] | [ Send it to a friend ]


[ Contatto/Contact ] | [ Home Page ] | [Tutte le notizie/All news ]







Uruknet on Twitter




:: RSS updated to 2.0

:: English
:: Italiano



:: Uruknet for your mobile phone:
www.uruknet.mobi


Uruknet on Facebook






:: Motore di ricerca / Search Engine


uruknet
the web



:: Immagini / Pictures


Initial
Middle




The newsletter archive




L'Impero si è fermato a Bahgdad, by Valeria Poletti


Modulo per ordini




subscribe

:: Newsletter

:: Comments


Haq Agency
Haq Agency - English

Haq Agency - Arabic


AMSI
AMSI - Association of Muslim Scholars in Iraq - English

AMSI - Association of Muslim Scholars in Iraq - Arabic




Font size
Carattere
1 2 3





:: All events








     

[ home page] | [ tutte le notizie/all news ] | [ download banner] | [ ultimo aggiornamento/last update 25/04/2014 04:18 ]




Uruknet receives daily many hacking attempts. To prevent this, we have 10 websites on 6 servers in different places. So, if the website is slow or it does not answer, you can recall one of the other web sites: www.uruknet.info www.uruknet.de www.uruknet.biz www.uruknet.org.uk www.uruknet.com www.uruknet.org - www.uruknet.it www.uruknet.eu www.uruknet.net www.uruknet.web.at.it




:: This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. In accordance with Title 17 U.S.C. Section 107, the material on this site is distributed without profit to those who have expressed a prior interest in receiving the included information for research and educational purposes. For more info go to: http://www.law.cornell.edu/uscode/17/107.shtml. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner.
::  We always mention the author and link the original site and page of every article.
uruknet, uruklink, iraq, uruqlink, iraq, irak, irakeno, iraqui, uruk, uruqlink, saddam hussein, baghdad, mesopotamia, babilonia, uday, qusay, udai, qusai,hussein, feddayn, fedayn saddam, mujaheddin, mojahidin, tarek aziz, chalabi, iraqui, baath, ba'ht, Aljazira, aljazeera, Iraq, Saddam Hussein, Palestina, Sharon, Israele, Nasser, ahram, hayat, sharq awsat, iraqwar,irakwar All pictures

url originale



 

I nostri partner - Our Partners:


TEV S.r.l.

TEV S.r.l.: hosting

www.tev.it

Progetto Niz

niz: news management

www.niz.it

Digitbrand

digitbrand: ".it" domains

www.digitbrand.com

Worlwide Mirror Web-Sites:
www.uruknet.info (Main)
www.uruknet.com
www.uruknet.net
www.uruknet.org
www.uruknet.us (USA)
www.uruknet.su (Soviet Union)
www.uruknet.ru (Russia)
www.uruknet.it (Association)
www.uruknet.web.at.it
www.uruknet.biz
www.uruknet.mobi (For Mobile Phones)
www.uruknet.org.uk (UK)
www.uruknet.de (Germany)
www.uruknet.ir (Iran)
www.uruknet.eu (Europe)
wap.uruknet.info (For Mobile Phones)
rss.uruknet.info (For Rss Feeds)
www.uruknet.tel

Vat Number: IT-97475000150