<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Create a 10.in-addr.arpa zone with appropriate delegations and have all servers serve it. That way they can all find te sub zones. <div><br><div dir="ltr">-- <div>Mark Andrews</div></div><div dir="ltr"><br><blockquote type="cite">On 16 Sep 2023, at 10:16, John Thurston <john.thurston@alaska.gov> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<p>A host which auto-registers in MS DNS, creates an A in
foo.alaska.gov and PTR in whatever.10.in-addr.arpa. MS DNS is
happy to publish those.</p>
<p>But the DNS system running on BIND also has a
whatever.10.in-addr.arpa zone. <br>
</p>
<p>So if I want to find the PTR for 13.12.11.10.in-addr.arpa, I must
query both DNS systems in turn. If I get NXDOMAIN from both, then
I can say the PTR doesn't exist.</p>
<p>On each system, I'd like to be able to take the 10.in-addr.arpa
data from the other, compute the differences, and incorporate them
locally. Then I'll be able to query either system, and accept an
NXDOMAIN with confidence.<br>
</p>
<p>And since writing my earlier note, I have re-located the code I
think I stumbled across earlier</p>
<p>Tony Finch's "nsdiff"</p>
<p><br>
</p>
<p><a class="moz-txt-link-freetext" href="https://dotat.at/prog/nsdiff/">https://dotat.at/prog/nsdiff/</a><br>
</p>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Do things because you should, not just because you can.
John Thurston 907-465-8591
<a class="moz-txt-link-abbreviated" href="mailto:John.Thurston@alaska.gov">John.Thurston@alaska.gov</a>
Department of Administration
State of Alaska</pre>
<div class="moz-cite-prefix">On 9/15/2023 2:21 PM, Greg Choules
wrote:<br>
</div>
<blockquote type="cite" cite="mid:CANsEUy2Y3AcAvsfmoRBakQq5cSk9Qc0L8xR+NrqvFQ60ZCefbg@mail.gmail.com">
<div>
<div>
<div dir="ltr">Hi John.
<div>Can you tell me a bit more please?</div>
<div>- What zones exist in both BIND and MS DNS for
something.10.in-addr.arpa?</div>
<div>- Where are hosts auto registering to? I'd guess MS,
but it would be good to confirm.</div>
<div>- What does fragmentation look like? A few real
examples would be useful. I'm trying to understand just
what is the problem.</div>
<div>- How much of 10 do you use?</div>
<div>- What do you mean by "...can be published from two
different DNS services."? Could you expand on that please?</div>
<div>- Is there any zone transfer between BIND and MS DNS?</div>
<div><br>
</div>
<div>Thanks, Greg</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 15 Sept 2023 at
21:00, John Thurston <<a href="mailto:john.thurston@alaska.gov" moz-do-not-send="true" class="moz-txt-link-freetext">john.thurston@alaska.gov</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid
rgb(204,204,204);padding-left:1ex">
<div>
<p>This question involves making our BIND system work
with Microsoft's DNS software. If this makes it
off-topic, let me know and I'll be quiet about it.</p>
<p>We use ISC BIND to hold and host most of our zone
data. Internally, we have delegated some zones, and
they are held in Microsoft DNS. These zones are used
for MS Active Directory 'Domains', and accept
auto-registration of DNS records from authorized
hosts. Because we are using 10-dot addresses
internally, the auto-registration by hosts causes
fragmentation of the 10.in-addr.arpa zone data.
<br>
</p>
<p>I recall someone once offered a bit of code to mash
this zone data back together, so the same information
can be published from two different DNS services. I've
hunted through this list's archive and have not found
the reference. Before I go roll my own, can anyone
point me at an existing solution?<br>
</p>
<pre cols="72">--
--
Do things because you should, not just because you can.
John Thurston 907-465-8591
<a href="mailto:John.Thurston@alaska.gov" target="_blank" moz-do-not-send="true" class="moz-txt-link-freetext">John.Thurston@alaska.gov</a>
Department of Administration
State of Alaska</pre>
</div>
<br>
</blockquote>
</div>
</div>
</div>
</blockquote>
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