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<div class="moz-cite-prefix">On 9/9/19 12:50 PM, Thomas Mieslinger
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:5e837b81-0bdd-232f-274d-06869c1ec95f@mail.com">Is there
any documentation how the mozilla guys did it with which
<br>
recursive/authoritative Software</blockquote>
<p>I'm not aware of any, but I think it's like usual DNS filtering.
That zone is currently signed, so making it NXDOMAIN will
inevitably cause a problem for validators "below", though that's
probably not a significant concern for you.</p>
<p>With Knot Resolver this kind of filtering is fortunately quite
easy:<br>
<span class="c-message_kit__text" dir="auto" data-qa="text-atom">
<pre class="c-mrkdwn__pre" data-stringify-type="pre">policy.add(policy.suffix(policy.DENY, {todname('use-application-dns.net.')}))
</pre>
</span></p>
<p>More knowledgeable people will surely soon write howtos for
others.<br>
</p>
<p>--Vladimir<br>
<br>
</p>
<p><span class="c-message_kit__text" dir="auto" data-qa="text-atom"></span></p>
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