[as112-ops] Discovering AS112 nodes via RIPE Atlas

[Joe Abley]

Hi Barry,

John Heidemann at ISI tried to count the number of AS112 nodes using open resolvers back in 2013. He wrote up his methodology here:

  http://ftp.isi.edu/~johnh/PAPERS/Fan13a.pdf <http://ftp.isi.edu/~johnh/PAPERS/Fan13a.pdf>

They found 65 instances using 300,000 open recursive servers.


Joe 

On 12 Dec 2017, at 09:38, Barry O'Donovan <barry.odonovan at inex.ie> wrote:

> Curiosity got the better of me reading the home.arpa thread on how many
> AS112 nodes actually exist.
> 
> Using all 8,331 RIPE Atlas probes with criteria: connected, ipv4-works,
> dns-a-works, has asnv4 and ipv4 stable >= 1 day, I found 69 nodes.
> 
> These probes were asked to do a TXT IPv4 DNS lookup against
> hostname.as112.net targeting the as112 anycast address of 192.175.48.6.
> 
> See attached csv where column 1 is the number of probes using that node
> and the remaining columns are the TXT records for the above query.
> 
> The top 16 (>100 probes) are:
> 
> Probes - Node
> 1379 - AS112 node of IN-Berlin e.V.
> 730 - Hivane Networks, Paris, FR
> 691 - RIPE NCC, Amsterdam, The Netherlands
> 362 - Widgets, Pty Ltd KK GmbH LLC Inc (?)
> 313 - ClueTrust (AS16668), Ashburn, VA, USA
> 306 - DE-CIX Management GmbH Frankfurt am Main, Germany
> 270 - Goscomb Technologies Limited, London, GB
> 196 - IPACCT Ltd. AS112 Instance Sofia, BG
> 181 - Phyxia Networks, Brussels, Belgium, Europe
> 163 - NIX.CZ, Neutral Internet eXchange of Czech Republic
> 149 - Truenetwork Novosibirsk, Russia
> 145 - AS112 at Giganet-IX
> 125 - Afilias Global Registry Services
> 116 - WIDE Project Osaka, Japan
> 109 - MMTS-9 Moscow, Russia (MSK)
> 105 - AS112 node Frankfurt2 of Opteamax GmbH, Rheinbreitbach, Germany
> 
> 
> Some of the above may have multiple nodes reported the exact same TXT
> records ;_(
> 
> 
> All of this is just FYI.
> 
> I may try and tidy the scripts into something more usable...
> 
> - Barry
> 
> 
> PS: measurement results (batches of 1000 probes):
> 
> https://atlas.ripe.net/api/v2/measurements/10488976/results/
> https://atlas.ripe.net/api/v2/measurements/10488994/results/
> https://atlas.ripe.net/api/v2/measurements/10488995/results/
> https://atlas.ripe.net/api/v2/measurements/10489000/results/
> https://atlas.ripe.net/api/v2/measurements/10489001/results/
> https://atlas.ripe.net/api/v2/measurements/10489002/results/
> https://atlas.ripe.net/api/v2/measurements/10489005/results/
> https://atlas.ripe.net/api/v2/measurements/10489009/results/
> 
> 
> 
> -- 
> 
> Kind regards,
> Barry O'Donovan
> INEX Operations
> 
> https://www.inex.ie/support/
> +353 1 531 3339
> 
> 
> 
> <201712-as112-nodes-via-ripe-atlas.csv>_______________________________________________
> as112-ops mailing list
> as112-ops at lists.dns-oarc.net
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