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  • Committer: Teddy Hogeborn
  • Date: 2019-08-02 22:16:53 UTC
  • Revision ID: teddy@recompile.se-20190802221653-ic1iko9hbefzwsk7
Fix bug in server Debian package: Fails to start on first install

There has been a very long-standing bug where installation of the
server (the "mandos" Debian package) would fail to start the server
properly right after installation.  It would work on manual (re)start
after installation, or after reboot, and even after package purge and
reinstall, it would then work the first time.  The problem, it turns
out, is when the new "_mandos" user (and corresponding group) is
created, the D-Bus server is not reloaded, and is therefore not aware
of that user, and does not recognize the user and group name in the
/etc/dbus-1/system.d/mandos.conf file.  The Mandos server, when it
tries to start and access the D-Bus, is then not permitted to connect
to its D-Bus bus name, and disables D-Bus use as a fallback measure;
i.e. the server works, but it is not controllable via D-Bus commands
(via mandos-ctl or mandos-monitor).  The next time the D-Bus daemon is
reloaded for any reason, the new user & group would become visible to
the D-Bus daemon and after that, any restart of the Mandos server
would succeed and it would bind to its D-Bus name properly, and
thereby be visible and controllable by mandos-ctl & mandos-monitor.
This was mostly invisible when using sysvinit, but systemd makes the
problem visible since the systemd service file for the Mandos server
is configured to not consider the Mandos server "started" until the
D-Bus name has been bound; this makes the starting of the service wait
for 90 seconds and then fail with a timeout error.

Fixing this should also make the Debian CI autopkgtest tests work.

* debian/mandos.postinst (configure): After creating (or renaming)
                                      user & group, reload D-Bus
                                      daemon (if present).

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<?xml version="1.0" encoding="UTF-8"?>
 
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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 CONFNAME "mandos.conf">
 
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<!ENTITY CONFPATH "<filename>/etc/mandos/mandos.conf</filename>">
 
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<!ENTITY TIMESTAMP "2019-06-20">
 
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<!ENTITY % common SYSTEM "common.ent">
 
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%common;
 
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]>
 
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<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
 
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  <refentryinfo>
 
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    <title>Mandos Manual</title>
 
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    <!-- NWalsh’s docbook scripts use this to generate the footer: -->
 
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    <productname>Mandos</productname>
 
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    <productnumber>&version;</productnumber>
 
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    <date>&TIMESTAMP;</date>
 
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    <authorgroup>
 
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      <author>
 
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        <firstname>Björn</firstname>
 
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        <surname>Påhlsson</surname>
 
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        <address>
 
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          <email>belorn@recompile.se</email>
 
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        </address>
 
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      </author>
 
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      <author>
 
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        <firstname>Teddy</firstname>
 
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        <surname>Hogeborn</surname>
 
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        <address>
 
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          <email>teddy@recompile.se</email>
 
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        </address>
 
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      </author>
 
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    </authorgroup>
 
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    <copyright>
 
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      <year>2008</year>
 
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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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      <year>2019</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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    <xi:include href="legalnotice.xml"/>
 
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  </refentryinfo>
 
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  <refmeta>
 
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    <refentrytitle>&CONFNAME;</refentrytitle>
 
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    <manvolnum>5</manvolnum>
 
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  </refmeta>
 
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  <refnamediv>
 
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    <refname><filename>&CONFNAME;</filename></refname>
 
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    <refpurpose>
 
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      Configuration file for the Mandos server
 
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    </refpurpose>
 
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  </refnamediv>
 
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  <refsynopsisdiv>
 
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    <synopsis>&CONFPATH;</synopsis>
 
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  </refsynopsisdiv>
 
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  <refsect1 id="description">
 
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    <title>DESCRIPTION</title>
 
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    <para>
 
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      The file &CONFPATH; is a simple configuration file for
 
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      <citerefentry><refentrytitle>mandos</refentrytitle>
 
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      <manvolnum>8</manvolnum></citerefentry>, and is read by it at
 
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      startup.  The configuration file starts with <quote><literal
 
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      >[DEFAULT]</literal></quote> on a line by itself, followed by
 
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      any number of <quote><varname><replaceable>option</replaceable
 
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      ></varname>=<replaceable>value</replaceable></quote> entries,
 
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      with continuations in the style of RFC 822.  <quote><varname
 
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      ><replaceable>option</replaceable></varname>: <replaceable
 
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      >value</replaceable></quote> is also accepted.  Note that
 
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      leading whitespace is removed from values.  Lines beginning with
 
83
      <quote>#</quote> or <quote>;</quote> are ignored and may be used
 
84
      to provide comments.
 
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    </para>
 
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  </refsect1>
 
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  <refsect1>
 
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    <title>OPTIONS</title>
 
90
    
 
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    <variablelist>
 
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      <varlistentry>
 
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        <term><option>interface<literal> = </literal><replaceable
 
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        >NAME</replaceable></option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="interface"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>address<literal> = </literal><replaceable
 
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          >ADDRESS</replaceable></option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="address"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>port<literal> = </literal><replaceable
 
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        >NUMBER</replaceable></option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="port"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>debug<literal> = </literal>{ <literal
 
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          >1</literal> | <literal>yes</literal> | <literal
 
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          >true</literal> | <literal>on</literal> | <literal
 
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          >0</literal> | <literal>no</literal> | <literal
 
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          >false</literal> | <literal>off</literal> }</option></term>
 
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        <listitem>
 
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          <xi:include href="mandos-options.xml" xpointer="debug"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>priority<literal> = </literal><replaceable
 
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        >STRING</replaceable></option></term>
 
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        <listitem>
 
131
          <xi:include href="mandos-options.xml" xpointer="priority"/>
 
132
        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>servicename<literal> = </literal
 
137
        ><replaceable>NAME</replaceable></option></term>
 
138
        <listitem>
 
139
          <xi:include href="mandos-options.xml"
 
140
                      xpointer="servicename"/>
 
141
        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>use_dbus<literal> = </literal>{ <literal
 
146
          >1</literal> | <literal>yes</literal> | <literal
 
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          >true</literal> | <literal>on</literal> | <literal
 
148
          >0</literal> | <literal>no</literal> | <literal
 
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          >false</literal> | <literal>off</literal> }</option></term>
 
150
        <listitem>
 
151
          <xi:include href="mandos-options.xml" xpointer="dbus"/>
 
152
        </listitem>
 
153
      </varlistentry>
 
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155
      <varlistentry>
 
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        <term><option>use_ipv6<literal> = </literal>{ <literal
 
157
          >1</literal> | <literal>yes</literal> | <literal
 
158
          >true</literal> | <literal>on</literal> | <literal
 
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          >0</literal> | <literal>no</literal> | <literal
 
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          >false</literal> | <literal>off</literal> }</option></term>
 
161
        <listitem>
 
162
          <xi:include href="mandos-options.xml" xpointer="ipv6"/>
 
163
        </listitem>
 
164
      </varlistentry>
 
165
      
 
166
      <varlistentry>
 
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        <term><option>restore<literal> = </literal>{ <literal
 
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          >1</literal> | <literal>yes</literal> | <literal
 
169
          >true</literal> | <literal>on</literal> | <literal
 
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          >0</literal> | <literal>no</literal> | <literal
 
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          >false</literal> | <literal>off</literal> }</option></term>
 
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        <listitem>
 
173
          <xi:include href="mandos-options.xml" xpointer="restore"/>
 
174
        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>statedir<literal> = </literal><replaceable
 
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        >DIRECTORY</replaceable></option></term>
 
180
        <listitem>
 
181
          <xi:include href="mandos-options.xml" xpointer="statedir"/>
 
182
        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>socket<literal> = </literal><replaceable
 
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        >NUMBER</replaceable></option></term>
 
188
        <listitem>
 
189
          <xi:include href="mandos-options.xml" xpointer="socket"/>
 
190
        </listitem>
 
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      </varlistentry>
 
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193
    </variablelist>
 
194
  </refsect1>
 
195
  
 
196
  <refsect1 id="files">
 
197
    <title>FILES</title>
 
198
    <para>
 
199
      The file described here is &CONFPATH;
 
200
    </para>
 
201
  </refsect1>
 
202
  
 
203
  <refsect1 id="bugs">
 
204
    <title>BUGS</title>
 
205
    <para>
 
206
      The <literal>[DEFAULT]</literal> is necessary because the Python
 
207
      built-in module <systemitem class="library">ConfigParser</systemitem>
 
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      requires it.
 
209
    </para>
 
210
    <xi:include href="bugs.xml"/>
 
211
  </refsect1>
 
212
  
 
213
  <refsect1 id="example">
 
214
    <title>EXAMPLE</title>
 
215
    <informalexample>
 
216
      <para>
 
217
        No options are actually required:
 
218
      </para>
 
219
      <programlisting>
 
220
[DEFAULT]
 
221
      </programlisting>
 
222
    </informalexample>
 
223
    <informalexample>
 
224
      <para>
 
225
        An example using all the options:
 
226
      </para>
 
227
      <programlisting>
 
228
[DEFAULT]
 
229
# A configuration example
 
230
interface = enp1s0
 
231
address = fe80::aede:48ff:fe71:f6f2
 
232
port = 1025
 
233
debug = True
 
234
priority = SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA:!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA
 
235
servicename = Daena
 
236
use_dbus = False
 
237
use_ipv6 = True
 
238
restore = True
 
239
statedir = /var/lib/mandos
 
240
      </programlisting>
 
241
    </informalexample>
 
242
  </refsect1>
 
243
  
 
244
  <refsect1 id="see_also">
 
245
    <title>SEE ALSO</title>
 
246
    <para>
 
247
      <citerefentry><refentrytitle>intro</refentrytitle>
 
248
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
249
      <citerefentry><refentrytitle>gnutls_priority_init</refentrytitle
 
250
      ><manvolnum>3</manvolnum></citerefentry>,
 
251
      <citerefentry><refentrytitle>mandos</refentrytitle>
 
252
      <manvolnum>8</manvolnum></citerefentry>,
 
253
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
254
      <manvolnum>5</manvolnum></citerefentry>
 
255
    </para>
 
256
    
 
257
    <variablelist>
 
258
      <varlistentry>
 
259
        <term>
 
260
          RFC 4291: <citetitle>IP Version 6 Addressing
 
261
          Architecture</citetitle>
 
262
        </term>
 
263
        <listitem>
 
264
          <variablelist>
 
265
            <varlistentry>
 
266
              <term>Section 2.2: <citetitle>Text Representation of
 
267
              Addresses</citetitle></term>
 
268
              <listitem><para/></listitem>
 
269
            </varlistentry>
 
270
            <varlistentry>
 
271
              <term>Section 2.5.5.2: <citetitle>IPv4-Mapped IPv6
 
272
              Address</citetitle></term>
 
273
              <listitem><para/></listitem>
 
274
            </varlistentry>
 
275
            <varlistentry>
 
276
            <term>Section 2.5.6, <citetitle>Link-Local IPv6 Unicast
 
277
            Addresses</citetitle></term>
 
278
            <listitem>
 
279
              <para>
 
280
                The clients use IPv6 link-local addresses, which are
 
281
                immediately usable since a link-local addresses is
 
282
                automatically assigned to a network interface when it
 
283
                is brought up.
 
284
              </para>
 
285
            </listitem>
 
286
            </varlistentry>
 
287
          </variablelist>
 
288
        </listitem>
 
289
      </varlistentry>
 
290
      <varlistentry>
 
291
        <term>
 
292
          <ulink url="http://www.zeroconf.org/">Zeroconf</ulink>
 
293
        </term>
 
294
        <listitem>
 
295
          <para>
 
296
            Zeroconf is the network protocol standard used by clients
 
297
            for finding the Mandos server on the local network.
 
298
          </para>
 
299
        </listitem>
 
300
      </varlistentry>
 
301
    </variablelist>
 
302
  </refsect1>
 
303
</refentry>
 
304
<!-- Local Variables: -->
 
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<!-- time-stamp-start: "<!ENTITY TIMESTAMP [\"']" -->
 
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<!-- time-stamp-end: "[\"']>" -->
 
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<!-- time-stamp-format: "%:y-%02m-%02d" -->
 
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<!-- End: -->