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4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<link rel="prev" href="Bv9ARM.ch07.html" title="Chapter�7.�BIND 9 Security Considerations">
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4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<tr><th colspan="3" align="center">Chapter�8.�Troubleshooting</th></tr>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a accesskey="p" href="Bv9ARM.ch07.html">Prev</a>�</td>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<td width="20%" align="right">�<a accesskey="n" href="Bv9ARM.ch09.html">Next</a>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a name="Bv9ARM.ch08"></a>Chapter�8.�Troubleshooting</h1></div></div></div>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<dt><span class="section"><a href="Bv9ARM.ch08.html#common_problems">Common Problems</a></span></dt>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<dd><dl><dt><span class="section"><a href="Bv9ARM.ch08.html#id-1.9.2.2">It's not working; how can I figure out what's wrong?</a></span></dt></dl></dd>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<dt><span class="section"><a href="Bv9ARM.ch08.html#id-1.9.3">Incrementing and Changing the Serial Number</a></span></dt>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<dt><span class="section"><a href="Bv9ARM.ch08.html#more_help">Where Can I Get Help?</a></span></dt>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<div class="titlepage"><div><div><h2 class="title" style="clear: both">
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a name="common_problems"></a>Common Problems</h2></div></div></div>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a name="id-1.9.2.2"></a>It's not working; how can I figure out what's wrong?</h3></div></div></div>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The best solution to solving installation and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync configuration issues is to take preventative measures by setting
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync up logging files beforehand. The log files provide a
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync source of hints and information that can be used to figure out
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync what went wrong and how to fix the problem.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<div class="titlepage"><div><div><h2 class="title" style="clear: both">
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a name="id-1.9.3"></a>Incrementing and Changing the Serial Number</h2></div></div></div>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Zone serial numbers are just numbers — they aren't
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync date related. A lot of people set them to a number that
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync represents a date, usually of the form YYYYMMDDRR.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Occasionally they will make a mistake and set them to a
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync "date in the future" then try to correct them by setting
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync them to the "current date". This causes problems because
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync serial numbers are used to indicate that a zone has been
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync updated. If the serial number on the slave server is
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync lower than the serial number on the master, the slave
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync server will attempt to update its copy of the zone.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync Setting the serial number to a lower number on the master
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync server than the slave server means that the slave will not perform
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync updates to its copy of the zone.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The solution to this is to add 2147483647 (2^31-1) to the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync number, reload the zone and make sure all slaves have updated to
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync the new zone serial number, then reset the number to what you want
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync it to be, and reload the zone again.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<div class="titlepage"><div><div><h2 class="title" style="clear: both">
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a name="more_help"></a>Where Can I Get Help?</h2></div></div></div>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync The Internet Systems Consortium
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync (<acronym class="acronym">ISC</acronym>) offers a wide range
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync of support and service agreements for <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym> servers. Four
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync levels of premium support are available and each level includes
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync support for all <acronym class="acronym">ISC</acronym> programs,
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync significant discounts on products
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync and training, and a recognized priority on bug fixes and
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync non-funded feature requests. In addition, <acronym class="acronym">ISC</acronym> offers a standard
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync support agreement package which includes services ranging from bug
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync fix announcements to remote support. It also includes training in
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym>.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync To discuss arrangements for support, contact
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync <a class="link" href="mailto:info@isc.org" target="_top">info@isc.org</a> or visit the
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync <a class="link" href="http://www.isc.org/services/support/" target="_top">http://www.isc.org/services/support/</a>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync to read more.
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<a accesskey="p" href="Bv9ARM.ch07.html">Prev</a>�</td>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<td width="40%" align="right">�<a accesskey="n" href="Bv9ARM.ch09.html">Next</a>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<td width="40%" align="left" valign="top">Chapter�7.�<acronym class="acronym">BIND</acronym> 9 Security Considerations�</td>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<td width="20%" align="center"><a accesskey="h" href="Bv9ARM.html">Home</a></td>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<td width="40%" align="right" valign="top">�Appendix�A.�Release Notes</td>
4fd606d1f5abe38e1f42c38de1d2e895166bd0f4vboxsync<p xmlns:db="http://docbook.org/ns/docbook" style="text-align: center;">BIND 9.11.1</p>