DNS Recursive Operators: Please enable QNAME minimization (RFC7816) for the enhanced privacy of your users

[owen at delong.com (Owen DeLong)]

For anyone considering enabling DOH, I seriously recommend reviewing Paul Vixieâ??s keynote at SCaLE 18x Saturday morning.

https://www.youtube.com/watch?v=artLJOwToVY

It contains a great deal of food for thought on a variety of forms of giving control over to corporations over things you probably donâ??t really want corporations controlling in your life.

Owen


> On Sep 27, 2019, at 10:33 , Curtis Maurand <cmaurand at xyonet.com> wrote:
> 
> powerdns dnsdist supports dns over https so you don't have to be held hostage by cloudflare or google.
> 
> 
> 
> On 9/18/19 10:19 AM, Mike Hammett wrote:
>> Why on Earth would anyone want that (Firefox deciding to do it's own DNS) as default behavior?
>> 
>> 
>> 
>> -----
>> Mike Hammett
>> Intelligent Computing Solutions <http://www.ics-il.com/>
>>  <https://www.facebook.com/ICSIL> <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> <https://www.linkedin.com/company/intelligent-computing-solutions> <https://twitter.com/ICSIL>
>> Midwest Internet Exchange <http://www.midwest-ix.com/>
>>  <https://www.facebook.com/mdwestix> <https://www.linkedin.com/company/midwest-internet-exchange> <https://twitter.com/mdwestix>
>> The Brothers WISP <http://www.thebrotherswisp.com/>
>>  <https://www.facebook.com/thebrotherswisp> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg>
>> From: "Jeroen Massar" <jeroen at massar.ch> <mailto:jeroen at massar.ch>
>> To: "NANOG" <nanog at nanog.org> <mailto:nanog at nanog.org>
>> Sent: Wednesday, September 18, 2019 2:15:49 AM
>> Subject: DNS Recursive Operators: Please enable QNAME minimization (RFC7816) for the enhanced privacy of your users
>> 
>> Hi Folks,
>> 
>> While in the US soon all Firefox users will *NOT* use your DNS Recursives configured using DHCP anymore
>> (NXDOMAIN use-application-dns.net <http://use-application-dns.net/> to avoid that[1]).
>> Next to that, it seems some of the root operators are now creating instances in the same networks that offer these kind of services for globally figuring out what queries are being made.
>> 
>> 
>> For those that thus either opt-out or otherwise want to use their own system resolvers, I suggest that all that run
>> DNS Recursive setups enable "QNAME minimization" as defined in (experimental) RFC7816 [2]
>> 
>> For pdns "qname-minimization=yes" [6]
>> For unbound "qname­-minimisation: yes" [5]
>> For BIND "qname-minimization" option [3] and [4]
>> 
>> Of course, do also provider your users with the option of using DoT or even DoH on your recursors...
>> 
>> Noting that DoH operators are supposed to enable RFC7816 also [7], guess they do not want others to see all the details they get...
>> 
>> Some more details in DNS Privacy Wiki [8]...
>> 
>> Discuss! :)
>> 
>> Greets,
>>  Jeroen
>> 
>> 
>> [1] https://support.mozilla.org/en-US/kb/configuring-networks-disable-dns-over-https <https://support.mozilla.org/en-US/kb/configuring-networks-disable-dns-over-https>
>> [2] https://tools.ietf.org/html/rfc7816 <https://tools.ietf.org/html/rfc7816>
>> [3] https://www.isc.org/blogs/qname-minimization-and-privacy/ <https://www.isc.org/blogs/qname-minimization-and-privacy/>
>> [4] https://gitlab.isc.org/isc-projects/bind9/issues/16 <https://gitlab.isc.org/isc-projects/bind9/issues/16>
>> [5] https://netlabs.nl/downloads/presentations/unbound_qnamemin_oarc24.pdf <https://netlabs.nl/downloads/presentations/unbound_qnamemin_oarc24.pdf>
>> [6] https://github.com/PowerDNS/pdns/issues/2311 <https://github.com/PowerDNS/pdns/issues/2311>
>> [7] https://wiki.mozilla.org/Security/DOH-resolver-policy <https://wiki.mozilla.org/Security/DOH-resolver-policy>
>> [8] https://dnsprivacy.org/wiki/ <https://dnsprivacy.org/wiki/>
>> 
> 
> 

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