Re: [dnssd] I-D Action: draft-ietf-dnssd-srp-23.txt

Ted Lemon <mellon@fugue.com> Tue, 03 October 2023 14:08 UTC

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From: Ted Lemon <mellon@fugue.com>
Date: Tue, 03 Oct 2023 10:07:56 -0400
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To: Alexander Clouter <alex+ietf@coremem.com>
Cc: dnssd@ietf.org
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Subject: Re: [dnssd] I-D Action: draft-ietf-dnssd-srp-23.txt
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This is a good point. We're a bit delayed in updating for reasons the
chairs are aware of. This might actually be a good way of addressing one of
the points that I _think_ was raised during IESG review; if so, it would be
appropriate. Can you propose text?

On Tue, Oct 3, 2023 at 9:48 AM Alexander Clouter <alex+ietf@coremem.com>
wrote:

> On Fri, 4 Aug 2023, at 23:37, internet-drafts@ietf.org wrote:
> >    Title           : Service Registration Protocol for DNS-Based Service
> Discovery
> >    Authors         : Ted Lemon
> >                      Stuart Cheshire
> >    Filename        : draft-ietf-dnssd-srp-23.txt
> >    Pages           : 40
> >    Date            : 2023-08-04
>
> Late to the party and tried searching the list archives, but 'TTL' in a
> DNS archive naturally steers you to the wrong kind of TTL.
>
> Apologies if this was already thrashed out.
>
> > Section 6.1 -  Source Validation
> >
> > [snipped]
> >
> > For example, a stub router [I-D.ietf-snac-simple] for a constrained
> network might only accept UDP updates from source addresses known to be
> on-link on that stub network, ...
>
> An IP header TTL of 255 can also provide proof of being on-link where the
> registrar verifies if the received TTL is 255; this technique is described
> in RFC 5082.
>
> Cheers
>
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