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Re: [OPSAWG] [Mud] changes to draft-richardson-opsawg-mud-iot-dns-considerations-03.txt

tirumal reddy <kondtir@gmail.com> Mon, 28 September 2020 07:14 UTC

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From: tirumal reddy <kondtir@gmail.com>
Date: Mon, 28 Sep 2020 12:44:04 +0530
Message-ID: <CAFpG3gf77dR7b07TY2He0srAf5-KhUk4D+sU5sj-CPWaFG1n6w@mail.gmail.com>
To: Eliot Lear <lear@cisco.com>
Cc: Michael Richardson <mcr+ietf@sandelman.ca>, opsawg <opsawg@ietf.org>, mud@ietf.org
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Subject: Re: [OPSAWG] [Mud] changes to draft-richardson-opsawg-mud-iot-dns-considerations-03.txt
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On Mon, 28 Sep 2020 at 12:33, Eliot Lear <lear@cisco.com> wrote:

> Tiru
>
> On 28 Sep 2020, at 08:52, tirumal reddy <kondtir@gmail.com> wrote:
>
>>
>> Not necessarily.  That is a matter of signaling between the CPE and the
>> ISP.
>>
>
> No, the special use domain name (SUDN) does not require any update to the
> CPE. The signaling from the endpoint is resolved by the ISP DNS recursive
> server and, it is not between the CPE and the ISP.
>
>
> All I am saying is this:
>
>      ,--------.          ,---.           ,------.
>      |Endpoint|          |CPE|           |ISPDNS|
>      `---+----'          `-+-'           `--+---'
>          |          1 A/AAAA Query          |
>          | --------------------------------->
>          |                 |                |
>          |        2 Response(A/AAAA)        |
>          | <---------------------------------
>          |                 |                |
>          |                 |3 add ACL/TR.369|
>          |                 | or similar     |
>          |                 |<----------------
>      ,---+----.          ,-+-.           ,--+---.
>      |Endpoint|          |CPE|           |ISPDNS|
>      `--------'          `---'           `------'
>
> You can substitute “ISPDNS” for whoever offers the CPE (like
> Google/Eero/etc, so long as the DNS infra and CPE know about one another
> and agree on a control channel).
>

Yes, that should work for managed CPE. ISPs and security vendors want to
host a encrypted DNS forwarder on the home router itself, see
https://tools.ietf.org/html/draft-box-add-requirements-00#section-3.1.2 and
https://tools.ietf.org/html/draft-campling-operator-observations-00

-Tiru


>
> Eliot
>
>

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