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+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
+ [<!ENTITY mdash "&#8212;">]>
+<!--
+ - Copyright (C) 2004-2008 Internet Systems Consortium, Inc. ("ISC")
+ - Copyright (C) 2000, 2001, 2003 Internet Software Consortium.
+ -
+ - Permission to use, copy, modify, and/or distribute this software for any
+ - purpose with or without fee is hereby granted, provided that the above
+ - copyright notice and this permission notice appear in all copies.
+ -
+ - THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ - REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ - AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ - INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ - LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ - OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ - PERFORMANCE OF THIS SOFTWARE.
+-->
+
+<!-- $Id: named.docbook,v 1.23 2008/11/06 05:30:24 marka Exp $ -->
+<refentry id="man.named">
+ <refentryinfo>
+ <date>June 30, 2000</date>
+ </refentryinfo>
+
+ <refmeta>
+ <refentrytitle><application>named</application></refentrytitle>
+ <manvolnum>8</manvolnum>
+ <refmiscinfo>BIND9</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname><application>named</application></refname>
+ <refpurpose>Internet domain name server</refpurpose>
+ </refnamediv>
+
+ <docinfo>
+ <copyright>
+ <year>2004</year>
+ <year>2005</year>
+ <year>2006</year>
+ <year>2007</year>
+ <year>2008</year>
+ <holder>Internet Systems Consortium, Inc. ("ISC")</holder>
+ </copyright>
+ <copyright>
+ <year>2000</year>
+ <year>2001</year>
+ <year>2003</year>
+ <holder>Internet Software Consortium.</holder>
+ </copyright>
+ </docinfo>
+
+ <refsynopsisdiv>
+ <cmdsynopsis>
+ <command>named</command>
+ <arg><option>-4</option></arg>
+ <arg><option>-6</option></arg>
+ <arg><option>-c <replaceable class="parameter">config-file</replaceable></option></arg>
+ <arg><option>-d <replaceable class="parameter">debug-level</replaceable></option></arg>
+ <arg><option>-f</option></arg>
+ <arg><option>-g</option></arg>
+ <arg><option>-m <replaceable class="parameter">flag</replaceable></option></arg>
+ <arg><option>-n <replaceable class="parameter">#cpus</replaceable></option></arg>
+ <arg><option>-p <replaceable class="parameter">port</replaceable></option></arg>
+ <arg><option>-s</option></arg>
+ <arg><option>-S <replaceable class="parameter">#max-socks</replaceable></option></arg>
+ <arg><option>-t <replaceable class="parameter">directory</replaceable></option></arg>
+ <arg><option>-u <replaceable class="parameter">user</replaceable></option></arg>
+ <arg><option>-v</option></arg>
+ <arg><option>-V</option></arg>
+ <arg><option>-x <replaceable class="parameter">cache-file</replaceable></option></arg>
+ </cmdsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>DESCRIPTION</title>
+ <para><command>named</command>
+ is a Domain Name System (DNS) server,
+ part of the BIND 9 distribution from ISC. For more
+ information on the DNS, see RFCs 1033, 1034, and 1035.
+ </para>
+ <para>
+ When invoked without arguments, <command>named</command>
+ will
+ read the default configuration file
+ <filename>/etc/named.conf</filename>, read any initial
+ data, and listen for queries.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>OPTIONS</title>
+
+ <variablelist>
+ <varlistentry>
+ <term>-4</term>
+ <listitem>
+ <para>
+ Use IPv4 only even if the host machine is capable of IPv6.
+ <option>-4</option> and <option>-6</option> are mutually
+ exclusive.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-6</term>
+ <listitem>
+ <para>
+ Use IPv6 only even if the host machine is capable of IPv4.
+ <option>-4</option> and <option>-6</option> are mutually
+ exclusive.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term>-c <replaceable class="parameter">config-file</replaceable></term>
+ <listitem>
+ <para>
+ Use <replaceable class="parameter">config-file</replaceable> as the
+ configuration file instead of the default,
+ <filename>/etc/named.conf</filename>. To
+ ensure that reloading the configuration file continues
+ to work after the server has changed its working
+ directory due to to a possible
+ <option>directory</option> option in the configuration
+ file, <replaceable class="parameter">config-file</replaceable> should be
+ an absolute pathname.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-d <replaceable class="parameter">debug-level</replaceable></term>
+ <listitem>
+ <para>
+ Set the daemon's debug level to <replaceable class="parameter">debug-level</replaceable>.
+ Debugging traces from <command>named</command> become
+ more verbose as the debug level increases.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-f</term>
+ <listitem>
+ <para>
+ Run the server in the foreground (i.e. do not daemonize).
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-g</term>
+ <listitem>
+ <para>
+ Run the server in the foreground and force all logging
+ to <filename>stderr</filename>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-m <replaceable class="parameter">flag</replaceable></term>
+ <listitem>
+ <para>
+ Turn on memory usage debugging flags. Possible flags are
+ <replaceable class="parameter">usage</replaceable>,
+ <replaceable class="parameter">trace</replaceable>,
+ <replaceable class="parameter">record</replaceable>,
+ <replaceable class="parameter">size</replaceable>, and
+ <replaceable class="parameter">mctx</replaceable>.
+ These correspond to the ISC_MEM_DEBUGXXXX flags described in
+ <filename>&lt;isc/mem.h&gt;</filename>.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-n <replaceable class="parameter">#cpus</replaceable></term>
+ <listitem>
+ <para>
+ Create <replaceable class="parameter">#cpus</replaceable> worker threads
+ to take advantage of multiple CPUs. If not specified,
+ <command>named</command> will try to determine the
+ number of CPUs present and create one thread per CPU.
+ If it is unable to determine the number of CPUs, a
+ single worker thread will be created.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-p <replaceable class="parameter">port</replaceable></term>
+ <listitem>
+ <para>
+ Listen for queries on port <replaceable class="parameter">port</replaceable>. If not
+ specified, the default is port 53.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-s</term>
+ <listitem>
+ <para>
+ Write memory usage statistics to <filename>stdout</filename> on exit.
+ </para>
+ <note>
+ <para>
+ This option is mainly of interest to BIND 9 developers
+ and may be removed or changed in a future release.
+ </para>
+ </note>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-S <replaceable class="parameter">#max-socks</replaceable></term>
+ <listitem>
+ <para>
+ Allow <command>named</command> to use up to
+ <replaceable class="parameter">#max-socks</replaceable> sockets.
+ </para>
+ <warning>
+ <para>
+ This option should be unnecessary for the vast majority
+ of users.
+ The use of this option could even be harmful because the
+ specified value may exceed the limitation of the
+ underlying system API.
+ It is therefore set only when the default configuration
+ causes exhaustion of file descriptors and the
+ operational environment is known to support the
+ specified number of sockets.
+ Note also that the actual maximum number is normally a little
+ fewer than the specified value because
+ <command>named</command> reserves some file descriptors
+ for its internal use.
+ </para>
+ </warning>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-t <replaceable class="parameter">directory</replaceable></term>
+ <listitem>
+ <para>Chroot
+ to <replaceable class="parameter">directory</replaceable> after
+ processing the command line arguments, but before
+ reading the configuration file.
+ </para>
+ <warning>
+ <para>
+ This option should be used in conjunction with the
+ <option>-u</option> option, as chrooting a process
+ running as root doesn't enhance security on most
+ systems; the way <function>chroot(2)</function> is
+ defined allows a process with root privileges to
+ escape a chroot jail.
+ </para>
+ </warning>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-u <replaceable class="parameter">user</replaceable></term>
+ <listitem>
+ <para>Setuid
+ to <replaceable class="parameter">user</replaceable> after completing
+ privileged operations, such as creating sockets that
+ listen on privileged ports.
+ </para>
+ <note>
+ <para>
+ On Linux, <command>named</command> uses the kernel's
+ capability mechanism to drop all root privileges
+ except the ability to <function>bind(2)</function> to
+ a
+ privileged port and set process resource limits.
+ Unfortunately, this means that the <option>-u</option>
+ option only works when <command>named</command> is
+ run
+ on kernel 2.2.18 or later, or kernel 2.3.99-pre3 or
+ later, since previous kernels did not allow privileges
+ to be retained after <function>setuid(2)</function>.
+ </para>
+ </note>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-v</term>
+ <listitem>
+ <para>
+ Report the version number and exit.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-V</term>
+ <listitem>
+ <para>
+ Report the version number and build options, and exit.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>-x <replaceable class="parameter">cache-file</replaceable></term>
+ <listitem>
+ <para>
+ Load data from <replaceable class="parameter">cache-file</replaceable> into the
+ cache of the default view.
+ </para>
+ <warning>
+ <para>
+ This option must not be used. It is only of interest
+ to BIND 9 developers and may be removed or changed in a
+ future release.
+ </para>
+ </warning>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ </refsect1>
+
+ <refsect1>
+ <title>SIGNALS</title>
+ <para>
+ In routine operation, signals should not be used to control
+ the nameserver; <command>rndc</command> should be used
+ instead.
+ </para>
+
+ <variablelist>
+
+ <varlistentry>
+ <term>SIGHUP</term>
+ <listitem>
+ <para>
+ Force a reload of the server.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>SIGINT, SIGTERM</term>
+ <listitem>
+ <para>
+ Shut down the server.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ <para>
+ The result of sending any other signals to the server is undefined.
+ </para>
+
+ </refsect1>
+
+ <refsect1>
+ <title>CONFIGURATION</title>
+ <para>
+ The <command>named</command> configuration file is too complex
+ to describe in detail here. A complete description is provided
+ in the
+ <citetitle>BIND 9 Administrator Reference Manual</citetitle>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>FILES</title>
+
+ <variablelist>
+
+ <varlistentry>
+ <term><filename>/etc/named.conf</filename></term>
+ <listitem>
+ <para>
+ The default configuration file.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><filename>/var/run/named/named.pid</filename></term>
+ <listitem>
+ <para>
+ The default process-id file.
+ </para>
+ </listitem>
+ </varlistentry>
+
+ </variablelist>
+
+ </refsect1>
+
+ <refsect1>
+ <title>SEE ALSO</title>
+ <para><citetitle>RFC 1033</citetitle>,
+ <citetitle>RFC 1034</citetitle>,
+ <citetitle>RFC 1035</citetitle>,
+ <citerefentry>
+ <refentrytitle>named-checkconf</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>named-checkzone</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>rndc</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>lwresd</refentrytitle>
+ <manvolnum>8</manvolnum>
+ </citerefentry>,
+ <citerefentry>
+ <refentrytitle>named.conf</refentrytitle>
+ <manvolnum>5</manvolnum>
+ </citerefentry>,
+ <citetitle>BIND 9 Administrator Reference Manual</citetitle>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>AUTHOR</title>
+ <para><corpauthor>Internet Systems Consortium</corpauthor>
+ </para>
+ </refsect1>
+
+</refentry><!--
+ - Local variables:
+ - mode: sgml
+ - End:
+-->