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<span>Official Documentation</span>
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<div class="breadcrumbs"><a href="https://help.ubuntu.com/">Ubuntu Documentation</a> > <a href="https://help.ubuntu.com/11.04">Ubuntu 11.04</a> > <span class="breadcrumb-link"><a href="index.html">Ubuntu Server Guide</a></span> > <span class="breadcrumb-link"><a href="dns.html">Domain Name Service (DNS)</a></span> > <span class="breadcrumb-node">References</span></div>
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<div xmlns="http://www.w3.org/1999/xhtml" class="sect1" title="References">
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<div class="titlepage">
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<h2 class="title" style="clear: both"><a id="dns-references"></a>References</h2>
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<div class="sect2" title="Common Record Types">
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<div class="titlepage">
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<h3 class="title"><a id="dns-record-types"></a>Common Record Types</h3>
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This section covers some of the most common DNS record types.
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<div class="itemizedlist">
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<ul class="itemizedlist" type="disc">
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<span class="emphasis"><em>A</em></span> record: This record maps an IP Address to a hostname.
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<pre class="programlisting">
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<span class="emphasis"><em>CNAME</em></span> record: Used to create an alias to an existing A record. You cannot create a CNAME record pointing to another CNAME record.
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<pre class="programlisting">
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<span class="emphasis"><em>MX</em></span> record: Used to define where email should be sent to. Must point to an A record, not a CNAME.
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<pre class="programlisting">
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IN MX 1 mail.example.com.
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mail IN A 192.168.1.13
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<li class="listitem">
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<span class="emphasis"><em>NS</em></span> record: Used to define which servers serve copies of a zone. It must point to an A record, not a CNAME.
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This is where Primary and Secondary servers are defined.
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<pre class="programlisting">
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IN NS ns.example.com.
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IN NS ns2.example.com.
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ns2 IN A 192.168.1.11
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<div class="sect2" title="More Information">
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<div class="titlepage">
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<h3 class="title"><a id="dns-more-info"></a>More Information</h3>
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<ul class="itemizedlist" type="disc">
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<li class="listitem">
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The <a class="ulink" href="http://www.tldp.org/HOWTO/DNS-HOWTO.html" target="_top">DNS HOWTO</a> explains more advanced options for configuring BIND9.
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<li class="listitem">
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For in depth coverage of <span class="emphasis"><em>DNS</em></span> and <span class="application"><strong>BIND9</strong></span> see <a class="ulink" href="http://www.bind9.net/" target="_top">Bind9.net</a>.
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<li class="listitem">
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<a class="ulink" href="http://www.oreilly.com/catalog/dns5/index.html" target="_top">DNS and BIND</a> is a popular book now in it's fifth edition.
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<li class="listitem">
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A great place to ask for <span class="application"><strong>BIND9</strong></span> assistance, and get involved with the Ubuntu Server community,
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is the <span class="emphasis"><em>#ubuntu-server</em></span> IRC channel on <a class="ulink" href="http://freenode.net" target="_top">freenode</a>.
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<li class="listitem">
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Also, see the <a class="ulink" href="https://help.ubuntu.com/community/BIND9ServerHowto" target="_top">BIND9 Server HOWTO</a> in the Ubuntu Wiki.
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<td width="40%" align="right" valign="top"> Chapter 8. Security</td>
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<p>The material in this document is available under a free license, see <a href="/legal.html">Legal</a> for details<br />
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For information on contributing see the <a href="https://wiki.ubuntu.com/DocumentationTeam">Ubuntu Documentation Team wiki page</a>. To report a problem, visit the <a href="https://bugs.launchpad.net/ubuntu/+source/ubuntu-docs">bug page for Ubuntu Documentation</a></p>
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