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Re: [Add] Comparative DoH Discovery DNS RR Types

tirumal reddy <kondtir@gmail.com> Tue, 30 June 2020 11:15 UTC

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From: tirumal reddy <kondtir@gmail.com>
Date: Tue, 30 Jun 2020 16:45:41 +0530
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To: Rob Sayre <sayrer@gmail.com>
Cc: "Livingood, Jason" <Jason_Livingood@comcast.com>, ADD Mailing list <add@ietf.org>
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Subject: Re: [Add] Comparative DoH Discovery DNS RR Types
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On Tue, 30 Jun 2020 at 09:04, Rob Sayre <sayrer@gmail.com> wrote:

> On Mon, Jun 29, 2020 at 8:37 AM Livingood, Jason <
> Jason_Livingood@comcast.com> wrote:
>
>> Just noting far we have a variety of suggestions on CNAME, URI, TXT,
>> RESINFO and HTTPSSVC (though I don’t think all have I-Ds as yet) - always
>> nice to see the ideas flowing. :-) As a practical person that in IETF land
>> is considered an implementer, I naturally feel inclined towards RR types
>> that already exist as this enables something to be rapidly deployed.
>>
>
> TXT was used for ESNI/ECH draft -02. It only took ten or twelve lines of
> code to get the value out of a DNS response, but it felt hacky, in the
> pejorative sense.
>

TXT has been misused by malware to exfiltrate data and to send C&C traffic.

-Tiru


>
> It seemed unlikely that a large number of server implementations would
> encode the data in the same way.
>
> thanks,
> Rob
>
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