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  • Committer: Teddy Hogeborn
  • Date: 2019-07-14 23:39:53 UTC
  • Revision ID: teddy@recompile.se-20190714233953-1zmsd3o062xloazt
Server bug fix: Allow restarts when using port= option

If the Mandos server is configured to use a specific TCP port to
listen to (by using the port= option in mandos.conf or the command
line --port option), that port becomes unusable for a time when the
Mandos server is restarted, making restarts fail.  Avoid this by, if a
port number is specified, using SO_REUSEADDR when binding the
listening TCP socket to a port number.

* mandos (IPv6_TCPServer.server_bind): Set self.allow_reuse_address if
                                       a port number is specified.

Reported-by: Juan Miguel Alcarria Herrera <juanmi@arco2000.es>

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mandos.conf.xml
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<?xml version='1.0' encoding='UTF-8'?>
 
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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 VERSION "1.0">
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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 "2008-08-29">
 
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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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    <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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    <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@fukt.bsnet.se</email>
 
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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@fukt.bsnet.se</email>
 
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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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    <legalnotice>
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      <para>
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        This manual page is free software: you can redistribute it
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        and/or modify it under the terms of the GNU General Public
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        License as published by the Free Software Foundation,
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        either version 3 of the License, or (at your option) any
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        later version.
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      </para>
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      <para>
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        This manual page is distributed in the hope that it will
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        be useful, but WITHOUT ANY WARRANTY; without even the
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        implied warranty of MERCHANTABILITY or FITNESS FOR A
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        PARTICULAR PURPOSE.  See the GNU General Public License
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        for more details.
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      </para>
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      <para>
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        You should have received a copy of the GNU General Public
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        License along with this program; If not, see
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        <ulink url="http://www.gnu.org/licenses/"/>.
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      </para>
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    </legalnotice>
 
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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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      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>
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      &CONFPATH;
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    </synopsis>
 
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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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      <quote>#</quote> or <quote>;</quote> are ignored and may be used
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      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>
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    <variablelist>
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      <varlistentry>
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        <term><varname>interface</varname></term>
 
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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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          <synopsis><literal>interface = </literal><replaceable
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          >NAME</replaceable>
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          </synopsis>
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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><varname>address</varname></term>
 
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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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          <synopsis><literal>address = </literal><replaceable
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          >ADDRESS</replaceable>
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          </synopsis>
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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><varname>port</varname></term>
 
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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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          <synopsis><literal>port = </literal><replaceable
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          >NUMBER</replaceable>
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          </synopsis>
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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><varname>debug</varname></term>
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        <listitem>
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          <synopsis><literal>debug = </literal>{ <literal
 
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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> }
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          </synopsis>
 
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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><varname>priority</varname></term>
 
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        <term><option>priority<literal> = </literal><replaceable
 
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        >STRING</replaceable></option></term>
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        <listitem>
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          <synopsis><literal>priority = </literal><replaceable
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          >STRING</replaceable>
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          </synopsis>
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          <xi:include href="mandos-options.xml" xpointer="priority"/>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
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        <term><varname>servicename</varname></term>
 
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        <term><option>servicename<literal> = </literal
 
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        ><replaceable>NAME</replaceable></option></term>
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        <listitem>
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          <synopsis><literal>servicename = </literal><replaceable
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          >NAME</replaceable>
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          </synopsis>
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          <xi:include href="mandos-options.xml"
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                      xpointer="servicename"/>
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        </listitem>
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      </varlistentry>
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      <varlistentry>
 
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        <term><option>use_dbus<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="dbus"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>use_ipv6<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="ipv6"/>
 
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        </listitem>
 
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      </varlistentry>
 
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      <varlistentry>
 
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        <term><option>restore<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="restore"/>
 
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        </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>
 
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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<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="socket"/>
 
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        </listitem>
 
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      </varlistentry>
 
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    </variablelist>
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  </refsect1>
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    <para>
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      The <literal>[DEFAULT]</literal> is necessary because the Python
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      built-in module <systemitem class="library">ConfigParser</systemitem>
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      requres it.
 
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      requires it.
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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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      <programlisting>
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[DEFAULT]
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# A configuration example
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interface = eth0
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address = 2001:db8:f983:bd0b:30de:ae4a:71f2:f672
 
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interface = enp1s0
 
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address = fe80::aede:48ff:fe71:f6f2
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port = 1025
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debug = true
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priority = SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP
 
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debug = True
 
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priority = SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA:!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA
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servicename = Daena
 
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use_dbus = False
 
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use_ipv6 = True
 
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restore = True
 
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statedir = /var/lib/mandos
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      </programlisting>
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    </informalexample>
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  </refsect1>
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  <refsect1 id="see_also">
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    <title>SEE ALSO</title>
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    <para>
 
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      <citerefentry><refentrytitle>intro</refentrytitle>
 
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      <manvolnum>8mandos</manvolnum></citerefentry>,
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      <citerefentry><refentrytitle>gnutls_priority_init</refentrytitle
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      ><manvolnum>3</manvolnum></citerefentry>,
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      <citerefentry><refentrytitle>mandos</refentrytitle>
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      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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      <manvolnum>5</manvolnum></citerefentry>
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    </para>
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    <variablelist>
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      <varlistentry>
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        <term>
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              <para>
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                The clients use IPv6 link-local addresses, which are
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                immediately usable since a link-local addresses is
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                automatically assigned to a network interfaces when it
 
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                automatically assigned to a network interface when it
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                is brought up.
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              </para>
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            </listitem>