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Re: [Add] draft-ietf-add-resolver-info-09

tirumal reddy <kondtir@gmail.com> Tue, 20 February 2024 14:38 UTC

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From: tirumal reddy <kondtir@gmail.com>
Date: Tue, 20 Feb 2024 20:07:41 +0530
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To: Mark Andrews <marka@isc.org>
Cc: add@ietf.org
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Subject: Re: [Add] draft-ietf-add-resolver-info-09
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On Thu, 15 Feb 2024 at 06:02, Mark Andrews <marka@isc.org> wrote:

> Why is it necessary to change the standard processing of queries for
> RESINFO when we already have a signal (AA=1) about whether the answer
> is coming from elsewhere or not ?
>

It is introduced to handle a scenario where SUDN is used to discover the
encrypted resolver, and if the discovered resolver does not support
RESINFO, it will forward the query upstream. An attacker might provide a
RESINFO response with AA=1. The proposed mechanism aims to help the client
identify whether the response is coming from the discovered encrypted
resolver.

-Tiru

>
>
> "   The content of the RDATA in a response to a RESINFO RR type query is
> defined in Section 5. If the resolver understands the RESINFO RR
> type, the RRSet in the Authority section MUST have exactly one
> record. The RESINFO in the Authority section reflects that the
> RESINFO is a property of the resolver and is not subject to recursive
> resolution."
>
> --
> Mark Andrews, ISC
> 1 Seymour St., Dundas Valley, NSW 2117, Australia
> PHONE: +61 2 9871 4742              INTERNET: marka@isc.org
>
> --
> Add mailing list
> Add@ietf.org
> https://www.ietf.org/mailman/listinfo/add
>

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