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Confusing BIND with CNAMEs

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Ian Gulliver
2019-04-15 02:12:33 +00:00
parent ae9351b8f3
commit 3ddb0792bb
4 changed files with 38 additions and 0 deletions
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19
2009-09-11-confusing-bind-with-cnames.html Normal file
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<!--# set var="title" value="Confusing BIND with CNAMEs" -->
<!--# set var="date" value="September 11, 2009" -->
<!--# include file="include/top.html" -->
<p>Given the zone:</p>
<pre><code>subdomain IN NS nameserver
nameserver IN CNAME nameserver.otherserver
</code></pre>
<p>in a BIND server that is both recursive and authoritative, requests without RD (recursion desired) return the NS record, while requests with RD return SERVFAIL. Changing it to:</p>
<pre><code>subdomain IN NS nameserver.otherserver
</code></pre>
<p>fixes the problem, though both resolution trees are perfectly valid.</p>
<!--# include file="include/bottom.html" -->

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index.html
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<li>2016-Feb-15: <a href="2016-02-15-cable-modem-channel-party.html">Cable modem channel party</a></li>
<li>2016-Feb-01: <a href="2016-02-01-how-to-enrage-your-cable-modem.html">How to enrage your cable modem</a></li>
<li>2016-Feb-01: <a href="2016-02-01-hall-of-2-4-ghz-shame-2016-edition.html">Hall of 2.4 GHz Shame, 2016 Edition</a></li>
<li>2009-Sep-11: <a href="2009-09-11-confusing-bind-with-cnames.html">Confusing BIND with CNAMEs</a></li>
<li>2009-Feb-19: <a href="2019-02-19-the-odd-case-of-my-mugging.html">The odd case of my mugging</a></li>
<li>2009-Feb-03: <a href="2009-02-03-5-packet-tcp-connection.html">5-packet TCP connection?</a></li>
</ol>

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markdown/2009-09-11-confusing-bind-with-cnames.md Normal file
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<!--# set var="title" value="Confusing BIND with CNAMEs" -->
<!--# set var="date" value="September 11, 2009" -->
<!--# include file="include/top.html" -->
Given the zone:
subdomain IN NS nameserver
nameserver IN CNAME nameserver.otherserver
in a BIND server that is both recursive and authoritative, requests without RD (recursion desired) return the NS record, while requests with RD return SERVFAIL. Changing it to:
subdomain IN NS nameserver.otherserver
fixes the problem, though both resolution trees are perfectly valid.
<!--# include file="include/bottom.html" -->

1
markdown/index.md
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@@ -19,6 +19,7 @@
1. 2016-Feb-15: [Cable modem channel party](2016-02-15-cable-modem-channel-party.html)
1. 2016-Feb-01: [How to enrage your cable modem](2016-02-01-how-to-enrage-your-cable-modem.html)
1. 2016-Feb-01: [Hall of 2.4 GHz Shame, 2016 Edition](2016-02-01-hall-of-2-4-ghz-shame-2016-edition.html)
1. 2009-Sep-11: [Confusing BIND with CNAMEs](2009-09-11-confusing-bind-with-cnames.html)
1. 2009-Feb-19: [The odd case of my mugging](2019-02-19-the-odd-case-of-my-mugging.html)
1. 2009-Feb-03: [5-packet TCP connection?](2009-02-03-5-packet-tcp-connection.html)