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Hooks take new "modules" argument, and hook names can contain periods.

* debian/mandos-client.README.Debian: Adjust wording.
* debian/rules (binary-common): Exclude nework-hooks.d directory from
                                dh_fixperms.
* initramfs-tools-hook: Also create network hook directory.  Allow
                        periods in hook names.  Only run executable
                        files in hook directory.  Copy needed modules.
* network-hooks.d/bridge: Fix "/usr/bin/brctl" to "/usr/sbin/brctl".
                          Also take "modules" argument.
* plugins.d/mandos-client.xml (NETWORK HOOKS/REQUIREMENTS): Document
                                                            the
                                                            allowing
                                                            of periods
                                                            in hook
                                                            names.
  (NETWORK HOOKS/REQUIREMENTS/files): Adjust wording.
  (NETWORK HOOKS/REQUIREMENTS/modules): New.
  (NETWORK HOOKS/REQUIREMENTS/MANDOSNETHOOKDIR): Clarify.
  (NETWORK HOOKS/REQUIREMENTS/MODE): Add "modules".

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mandos.xml
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY COMMANDNAME "mandos">
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<!ENTITY TIMESTAMP "2018-02-08">
 
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<!ENTITY TIMESTAMP "2011-10-03">
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<!ENTITY % common SYSTEM "common.ent">
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%common;
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]>
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      <year>2009</year>
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      <year>2010</year>
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      <year>2011</year>
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      <year>2012</year>
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      <year>2013</year>
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      <year>2014</year>
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      <year>2015</year>
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      <year>2016</year>
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      <year>2017</year>
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      <year>2018</year>
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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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      <arg><option>--no-dbus</option></arg>
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      <sbr/>
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      <arg><option>--no-ipv6</option></arg>
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      <sbr/>
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      <arg><option>--no-restore</option></arg>
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      <sbr/>
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      <arg><option>--statedir
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      <replaceable>DIRECTORY</replaceable></option></arg>
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      <sbr/>
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      <arg><option>--socket
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      <replaceable>FD</replaceable></option></arg>
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      <sbr/>
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      <arg><option>--foreground</option></arg>
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      <sbr/>
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      <arg><option>--no-zeroconf</option></arg>
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    </cmdsynopsis>
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    <cmdsynopsis>
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      <command>&COMMANDNAME;</command>
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          <xi:include href="mandos-options.xml" xpointer="ipv6"/>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--no-restore</option></term>
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        <listitem>
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          <xi:include href="mandos-options.xml" xpointer="restore"/>
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          <para>
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            See also <xref linkend="persistent_state"/>.
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--statedir
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        <replaceable>DIRECTORY</replaceable></option></term>
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        <listitem>
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          <xi:include href="mandos-options.xml" xpointer="statedir"/>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--socket
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        <replaceable>FD</replaceable></option></term>
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        <listitem>
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          <xi:include href="mandos-options.xml" xpointer="socket"/>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--foreground</option></term>
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        <listitem>
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          <xi:include href="mandos-options.xml"
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                      xpointer="foreground"/>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><option>--no-zeroconf</option></term>
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        <listitem>
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          <xi:include href="mandos-options.xml" xpointer="zeroconf"/>
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        </listitem>
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      </varlistentry>
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    </variablelist>
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  </refsect1>
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      extended timeout, checker program, and interval between checks
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      can be configured both globally and per client; see
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      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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      <manvolnum>5</manvolnum></citerefentry>.
 
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      <manvolnum>5</manvolnum></citerefentry>.  A client successfully
 
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      receiving its password will also be treated as a successful
 
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      checker run.
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    </para>
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  </refsect1>
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    <title>LOGGING</title>
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    <para>
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      The server will send log message with various severity levels to
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      <filename class="devicefile">/dev/log</filename>.  With the
 
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      <filename>/dev/log</filename>.  With the
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      <option>--debug</option> option, it will log even more messages,
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      and also show them on the console.
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    </para>
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  </refsect1>
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  <refsect1 id="persistent_state">
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    <title>PERSISTENT STATE</title>
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    <para>
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      Client settings, initially read from
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      <filename>clients.conf</filename>, are persistent across
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      restarts, and run-time changes will override settings in
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      <filename>clients.conf</filename>.  However, if a setting is
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      <emphasis>changed</emphasis> (or a client added, or removed) in
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      <filename>clients.conf</filename>, this will take precedence.
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    </para>
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  </refsect1>
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  <refsect1 id="dbus_interface">
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    <title>D-BUS INTERFACE</title>
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    <para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><filename>/run/mandos.pid</filename></term>
 
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        <term><filename>/var/run/mandos.pid</filename></term>
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        <listitem>
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          <para>
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            The file containing the process id of the
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            <command>&COMMANDNAME;</command> process started last.
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            <emphasis >Note:</emphasis> If the <filename
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            class="directory">/run</filename> directory does not
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            exist, <filename>/var/run/mandos.pid</filename> will be
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            used instead.
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><filename
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        class="directory">/var/lib/mandos</filename></term>
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        <listitem>
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          <para>
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            Directory where persistent state will be saved.  Change
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            this with the <option>--statedir</option> option.  See
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            also the <option>--no-restore</option> option.
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          </para>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><filename class="devicefile">/dev/log</filename></term>
 
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          </para>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><filename>/dev/log</filename></term>
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        <listitem>
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          <para>
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            The Unix domain socket to where local syslog messages are
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      backtrace.  This could be considered a feature.
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    </para>
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    <para>
 
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      Currently, if a client is disabled due to having timed out, the
 
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      server does not record this fact onto permanent storage.  This
 
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      has some security implications, see <xref linkend="clients"/>.
 
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    </para>
 
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    <para>
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      There is no fine-grained control over logging and debug output.
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    </para>
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    <para>
 
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      Debug mode is conflated with running in the foreground.
 
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    </para>
 
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    <para>
 
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      The console log messages do not show a time stamp.
 
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    </para>
 
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    <para>
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      This server does not check the expire time of clients’ OpenPGP
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      keys.
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    </para>
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    <xi:include href="bugs.xml"/>
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  </refsect1>
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  <refsect1 id="example">
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    <informalexample>
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      <para>
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        Run the server in debug mode, read configuration files from
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        the <filename class="directory">~/mandos</filename> directory,
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        and use the Zeroconf service name <quote>Test</quote> to not
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        collide with any other official Mandos server on this host:
 
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        the <filename>~/mandos</filename> directory, and use the
 
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        Zeroconf service name <quote>Test</quote> to not collide with
 
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        any other official Mandos server on this host:
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      </para>
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      <para>
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        compromised if they are gone for too long.
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      </para>
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      <para>
 
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        If a client is compromised, its downtime should be duly noted
 
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        by the server which would therefore disable the client.  But
 
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        if the server was ever restarted, it would re-read its client
 
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        list from its configuration file and again regard all clients
 
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        therein as enabled, and hence eligible to receive their
 
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        passwords.  Therefore, be careful when restarting servers if
 
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        it is suspected that a client has, in fact, been compromised
 
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        by parties who may now be running a fake Mandos client with
 
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        the keys from the non-encrypted initial <acronym>RAM</acronym>
 
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        image of the client host.  What should be done in that case
 
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        (if restarting the server program really is necessary) is to
 
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        stop the server program, edit the configuration file to omit
 
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        any suspect clients, and restart the server program.
 
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      </para>
 
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      <para>
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        For more details on client-side security, see
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        <citerefentry><refentrytitle>mandos-client</refentrytitle>
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        <manvolnum>8mandos</manvolnum></citerefentry>.
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      </varlistentry>
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      <varlistentry>
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        <term>
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          <ulink url="https://gnutls.org/">GnuTLS</ulink>
 
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          <ulink url="http://www.gnu.org/software/gnutls/"
 
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          >GnuTLS</ulink>
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        </term>
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      <listitem>
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        <para>
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      </varlistentry>
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      <varlistentry>
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        <term>
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          RFC 5246: <citetitle>The Transport Layer Security (TLS)
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          Protocol Version 1.2</citetitle>
 
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          RFC 4346: <citetitle>The Transport Layer Security (TLS)
 
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          Protocol Version 1.1</citetitle>
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        </term>
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      <listitem>
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        <para>
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          TLS 1.2 is the protocol implemented by GnuTLS.
 
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          TLS 1.1 is the protocol implemented by GnuTLS.
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        </para>
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      </listitem>
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      </varlistentry>
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      </varlistentry>
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      <varlistentry>
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        <term>
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          RFC 6091: <citetitle>Using OpenPGP Keys for Transport Layer
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          Security (TLS) Authentication</citetitle>
 
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          RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
 
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          Security</citetitle>
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        </term>
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      <listitem>
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        <para>