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

Wed Sep 18 14:25:43 UTC 2019

Because getting each ISP in the world to comply with NSA monitoring requests was too hard, instead they get to centralize the full list of every website the everyone in the world visits on a single fleet of servers in Cloudflare's datacenters. This means we only need to compromise one person to monitor the world, saving the US taxpayer significantly. Progress!

Matt

> On Sep 18, 2019, at 16:19, Mike Hammett <nanog at ics-il.net> wrote:
> 
> Why on Earth would anyone want that (Firefox deciding to do it's own DNS) as default behavior?
> 
> 
> 
> -----
> Mike Hammett
> Intelligent Computing Solutions
> 
> Midwest Internet Exchange
> 
> The Brothers WISP
> 
> From: "Jeroen Massar" <jeroen at massar.ch>
> To: "NANOG" <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 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
> [2] https://tools.ietf.org/html/rfc7816
> [3] https://www.isc.org/blogs/qname-minimization-and-privacy/
> [4] https://gitlab.isc.org/isc-projects/bind9/issues/16
> [5] https://netlabs.nl/downloads/presentations/unbound_qnamemin_oarc24.pdf
> [6] https://github.com/PowerDNS/pdns/issues/2311
> [7] https://wiki.mozilla.org/Security/DOH-resolver-policy
> [8] https://dnsprivacy.org/wiki/
> 
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