The objective here is a net improvement for privacy and integrity. It is
indeed a point of view with Nightly acting as an opinionated User Agent on
behalf of its users. IMO we can't be afraid of pursuing experiments that
help develop those ideas even when they move past traditional modes.
Traditional DNS is a swamp - ignoring that isn't doing our users any
favors. This is obviously not an engineering only driven effort.

Nightly is an explicitly experimental channel which is part of the reason
it is the choice for the first validation.

A question came up about geo based DNS and I've got a couple technical
comments about risk mitigation there:
 1] geo dns use is on the wane as TCP anycast approaches work much better
in practice
 2] the granularity of the CDN being used is much finer than the
granularity of most geoDNS resolution which tends to choose between very
big regions (O(~ 1/2 a continent)) so that should continue to work the same.

I initiated this thread on dev-platform because imo it is a reasonable
scope for nightly changes, especially ephemeral flip pref changes, and
that's why the FYI goes here. Its definitely not a secret. Messaging to a
larger user base than is impacted invites confusion. Future possible
changes impacting larger populations or putting things on trains would use
other, more broadly read communications channels.

-Patrick



On Mon, Mar 19, 2018 at 9:05 AM, Henri Sivonen <hsivo...@hsivonen.fi> wrote:

> On Mon, Mar 19, 2018 at 10:07 AM, Daniel Stenberg <dstenb...@mozilla.com>
> wrote:
> > On Sun, 18 Mar 2018, Eric Shepherd (Sheppy) wrote:
> >
> > I don't have such a far-reaching agreement with my ISP and its DNS.
>
> 1) Mozilla doesn't choose the ISP on users' behalf. (This is the key
> reason.)
> 2) The ISP sees the Host header in unencrypted traffic and SNI in
> encrypted traffic anyway. (This is a secondary reason.)
>
> > I don't
> > have such an agreement at all with 8.8.8.8 or other publicly provided DNS
> > operators.
>
> Using such resolvers is a decision that the user makes and not a
> decision that Mozilla *silently* makes on their behalf.
>
> > What other precautions or actions can we do to reduce the risk of this
> being
> > perceived as problematic?
>
> I suggested two ways on the bug.
>
> > Would reducing the test population really make it
> > much different?
>
> No.
>
> --
> Henri Sivonen
> hsivo...@hsivonen.fi
> https://hsivonen.fi/
> _______________________________________________
> dev-platform mailing list
> dev-platform@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-platform
>
>
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