[dns-operations] RFC 8145 section 5 queries hidden behind CZ.NIC public resolver

[Roy Arends]

use ‘—ignore-case’ or ‘-i’ with fgrep please

Roy

> On 5 Oct 2017, at 17:17, Petr Špaček <petr.spacek at nic.cz> wrote:
> 
> Hello list,
> 
> during ICANN Root KSK Roll Discussion at DNS-OARC 27 meeting there was
> an idea to look into data from resolvers to see how many clients is
> hidden behind a particular resolver.
> 
> This motivated me to look into anonymized PCAPs from CZ.NICs public
> resolver running at IPs 217.31.204.130 and 2001:1488:800:400::130 to see
> how many clients with RFC 8145 support is hidden behind this resolver.
> 
> It turns out that not very much, and that all captured RFC 8145 section
> 5 queries contain *both* root key ids (old + new).
> 
> Here are number of unique IP addresses querying in any given day.
> 
> 2017-08-31	2
> 2017-09-01	3
> 2017-09-02	1
> 2017-09-03	5
> 2017-09-04	5
> 2017-09-05	6
> 2017-09-06	4
> 2017-09-07	6
> 2017-09-08	4
> 2017-09-09	4
> 2017-09-10	3
> 2017-09-11	1
> 2017-09-12	5
> 2017-09-13	6
> 2017-09-14	5
> 2017-09-15	8
> 2017-09-16	4
> 2017-09-17	6
> 2017-09-18	4
> 2017-09-19	4
> 2017-09-20	7
> 2017-09-21	5
> 2017-09-22	5
> 2017-09-23	4
> 2017-09-24	2
> 2017-09-25	5
> 2017-09-26	3
> 2017-09-27	4
> 2017-09-28	3
> 2017-09-29	5
> 2017-09-30	6
> 
> To generate this, I used following command:
> tcpdump -nn -tt -r pcap | fgrep '_ta-' | fgrep -v dlv > ta.csv
> 
> For postprocesing I decided to use LibreOffice which made easy to
> convert UNIX timestamps to readable dates and then group results by date.
> 
> Hints:
> =<TIMESTAMP>/86400+25569 will give you number which can be directly
> formated as date
> 
> I hope this will encourage other operators to look into their data and
> publish results as well.
> 
> -- 
> Petr Špaček  @  CZ.NIC
> 
> P.S. I told to few people privately that there were none such queries
> behind the resolver. This statement was incorrect because of a mistake
> in data processing.
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