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8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce - Copyright (C) 2004-2012 Internet Systems Consortium, Inc. ("ISC")
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8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<link rel="prev" href="Bv9ARM.ch07.html" title="Chapter�7.�BIND 9 Security Considerations">
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8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<tr><th colspan="3" align="center">Chapter�8.�Troubleshooting</th></tr>
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<a accesskey="p" href="Bv9ARM.ch07.html">Prev</a>�</td>
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8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<div class="titlepage"><div><div><h2 class="title">
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<a name="Bv9ARM.ch08"></a>Chapter�8.�Troubleshooting</h2></div></div></div>
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2604140">Common Problems</a></span></dt>
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<dd><dl><dt><span class="sect2"><a href="Bv9ARM.ch08.html#id2604146">It's not working; how can I figure out what's wrong?</a></span></dt></dl></dd>
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2604157">Incrementing and Changing the Serial Number</a></span></dt>
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<dt><span class="sect1"><a href="Bv9ARM.ch08.html#id2604174">Where Can I Get Help?</a></span></dt>
c6872e79e8496fd075e20aec0343ade99cca725cSimo Sorce<div class="titlepage"><div><div><h2 class="title" style="clear: both">
ab967283b710dfa05d11ee5b30c7ac916486ceecSimo Sorce<a name="id2604140"></a>Common Problems</h2></div></div></div>
ab967283b710dfa05d11ee5b30c7ac916486ceecSimo Sorce<div class="titlepage"><div><div><h3 class="title">
ab967283b710dfa05d11ee5b30c7ac916486ceecSimo Sorce<a name="id2604146"></a>It's not working; how can I figure out what's wrong?</h3></div></div></div>
c6872e79e8496fd075e20aec0343ade99cca725cSimo Sorce The best solution to solving installation and
c6872e79e8496fd075e20aec0343ade99cca725cSimo Sorce configuration issues is to take preventative measures by setting
233a3c6c48972b177e60d6ef4cecfacd3cf31659Simo Sorce up logging files beforehand. The log files provide a
233a3c6c48972b177e60d6ef4cecfacd3cf31659Simo Sorce source of hints and information that can be used to figure out
dfd71fc92db940b2892cc996911cec03d7b6c52bSimo Sorce what went wrong and how to fix the problem.
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce<div class="titlepage"><div><div><h2 class="title" style="clear: both">
0c16d2eefbc6ac8331078a4cdcecfee817a71bc6Simo Sorce<a name="id2604157"></a>Incrementing and Changing the Serial Number</h2></div></div></div>
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce Zone serial numbers are just numbers — they aren't
0c16d2eefbc6ac8331078a4cdcecfee817a71bc6Simo Sorce date related. A lot of people set them to a number that
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce represents a date, usually of the form YYYYMMDDRR.
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce Occasionally they will make a mistake and set them to a
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce "date in the future" then try to correct them by setting
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce them to the "current date". This causes problems because
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce serial numbers are used to indicate that a zone has been
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce updated. If the serial number on the slave server is
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce lower than the serial number on the master, the slave
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce server will attempt to update its copy of the zone.
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce Setting the serial number to a lower number on the master
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce server than the slave server means that the slave will not perform
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce updates to its copy of the zone.
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce The solution to this is to add 2147483647 (2^31-1) to the
8bcabb97d988d1602882a1f036aac2eaf5e09234Simo Sorce number, reload the zone and make sure all slaves have updated to
of support and service agreements for <acronym class="acronym">BIND</acronym> and <acronym class="acronym">DHCP</acronym> servers. Four
<a href="http://www.isc.org/services/support/" target="_top">http://www.isc.org/services/support/</a>