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Re: [Add] [EXTERNAL] Re: Firefox DoH behaviour

Erik Kline <ek@loon.com> Tue, 16 July 2019 22:59 UTC

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Reply-To: ek@loon.com
From: Erik Kline <ek@loon.com>
Date: Tue, 16 Jul 2019 15:59:12 -0700
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To: Eric Rescorla <ekr@rtfm.com>
Cc: "Deen, Glenn (NBCUniversal)" <Glenn.Deen@nbcuni.com>, Jim Reid <jim@rfc1035.com>, "add@ietf.org" <add@ietf.org>
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Subject: Re: [Add] [EXTERNAL] Re: Firefox DoH behaviour
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On Tue, 16 Jul 2019 at 12:23, Eric Rescorla <ekr@rtfm.com> wrote:

>
>
> On Tue, Jul 16, 2019 at 11:56 AM Deen, Glenn (NBCUniversal) <
> Glenn.Deen@nbcuni.com> wrote:
>
>> Hi
>>
>> On Jul 16, 2019, at 1:56 PM, Eric Rescorla <ekr@rtfm.com> wrote:
>>
>> Sorry, this was badly written. Here's an attempt to clarify:
>>
>> if there is an enterprise policy that is set and it configures or enables
>> DoH, then when we will respect that. If there is an enterprise policy set
>> and it says nothing about DoH, then our plan is to disable DoH on the
>> theory that with high probability the enterprise would want DoH off.
>>
>> When I refer to enterprise policy I mean:
>> https://support.mozilla.org/en-US/products/firefox-enterprise/policies-customization-enterprise/policies-overview-enterprise
>>
>>
>> Just so I understand, this looks like it only applies to enterprise
>> managed desktops, or to PCs enrolled in a managed AD environment.
>>
>
> Yes.
>
>
>> Is there a general means for the enterprise to communicate it’s policy
>> for any Firefox instance that runs in its network?
>>
>
> Not at present.
> https://tools.ietf..org/html/draft-grover-add-policy-detection-00
> <https://tools.ietf.org/html/draft-grover-add-policy-detection-00> is an
> exploration of one possible avenue, but as has been discussed somewhat
> extensively, it's not a secure signal, so we're not sure how useful it is.
>

I was wondering about the possibility of having a signal in the intarea PVD
additional info
<https://tools.ietf.org/html/draft-ietf-intarea-provisioning-domains-05#section-4>
JSON.

Simplest: a boolean that says "our DNS servers do/do not filter". Compliant
apps/OSes can observe and choose to comply.

Slightly more complicated: a field that contains a list of resolvers that
do filtering.  Again, compliant OSes/apps can know to use those.

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