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<p>Hello.</p>
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<div class="moz-cite-prefix">On 08/09/2021 11.12, Ruben van Staveren
via dns-operations wrote:<br>
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<blockquote type="cite"
cite="mid:mailman.2782.1631101368.2947.dns-operations@lists.dns-oarc.net"><font
class="" size="2">should we do more analysis of this phenomenon
and even have a dns flag day before even more resolvers and
operators are going to implement RFC8198? There might be an
issue by deliberately exploiting this and make websites/mail
unreachable.</font></blockquote>
<p>Measuring how much this happens might be nice (or similar
problems), but I don't think it will be worth a flag day.
Aggressive resolvers have been deployed for years, and it
apparently hasn't caused that much trouble.</p>
<p>As for possibility of exploitation... experience (e.g. with F5)
shows that some parties just won't fix stuff until there's
significant pressure. I'd think that now the "gradient" for this
is that operators should deploy aggressive caching instead of
delaying, and that will help cleaning up this behavior (which has
been non-compliant since RFC 4034+, not since 8198).</p>
<p>--Vladimir | knot-resolver.cz<br>
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