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  • Committer: Teddy Hogeborn
  • Date: 2015-10-04 13:44:03 UTC
  • mto: (237.7.594 trunk)
  • mto: This revision was merged to the branch mainline in revision 327.
  • Revision ID: teddy@recompile.se-20151004134403-jn72bwgbw3aocllk
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mandos.xml
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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 COMMANDNAME "mandos">
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<!ENTITY TIMESTAMP "2008-08-30">
 
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<!ENTITY TIMESTAMP "2015-07-20">
 
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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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   <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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    <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>
 
35
      <year>2009</year>
 
36
      <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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      <holder>Teddy Hogeborn</holder>
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      <holder>Björn Påhlsson</holder>
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    </copyright>
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    <legalnotice>
38
 
      <para>
39
 
        This manual page is free software: you can redistribute it
40
 
        and/or modify it under the terms of the GNU General Public
41
 
        License as published by the Free Software Foundation,
42
 
        either version 3 of the License, or (at your option) any
43
 
        later version.
44
 
      </para>
45
 
 
46
 
      <para>
47
 
        This manual page is distributed in the hope that it will
48
 
        be useful, but WITHOUT ANY WARRANTY; without even the
49
 
        implied warranty of MERCHANTABILITY or FITNESS FOR A
50
 
        PARTICULAR PURPOSE.  See the GNU General Public License
51
 
        for more details.
52
 
      </para>
53
 
 
54
 
      <para>
55
 
        You should have received a copy of the GNU General Public
56
 
        License along with this program; If not, see
57
 
        <ulink url="http://www.gnu.org/licenses/"/>.
58
 
      </para>
59
 
    </legalnotice>
 
45
    <xi:include href="legalnotice.xml"/>
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  </refentryinfo>
61
 
 
 
47
  
62
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  <refmeta>
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    <refentrytitle>&COMMANDNAME;</refentrytitle>
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    <manvolnum>8</manvolnum>
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      Gives encrypted passwords to authenticated Mandos clients
71
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    </refpurpose>
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  </refnamediv>
73
 
 
 
59
  
74
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  <refsynopsisdiv>
75
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    <cmdsynopsis>
76
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      <command>&COMMANDNAME;</command>
77
 
      <arg>--interface<arg choice="plain">NAME</arg></arg>
78
 
      <arg>--address<arg choice="plain">ADDRESS</arg></arg>
79
 
      <arg>--port<arg choice="plain">PORT</arg></arg>
80
 
      <arg>--priority<arg choice="plain">PRIORITY</arg></arg>
81
 
      <arg>--servicename<arg choice="plain">NAME</arg></arg>
82
 
      <arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
83
 
      <arg>--debug</arg>
84
 
    </cmdsynopsis>
85
 
    <cmdsynopsis>
86
 
      <command>&COMMANDNAME;</command>
87
 
      <arg>-i<arg choice="plain">NAME</arg></arg>
88
 
      <arg>-a<arg choice="plain">ADDRESS</arg></arg>
89
 
      <arg>-p<arg choice="plain">PORT</arg></arg>
90
 
      <arg>--priority<arg choice="plain">PRIORITY</arg></arg>
91
 
      <arg>--servicename<arg choice="plain">NAME</arg></arg>
92
 
      <arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
93
 
      <arg>--debug</arg>
 
63
      <group>
 
64
        <arg choice="plain"><option>--interface
 
65
        <replaceable>NAME</replaceable></option></arg>
 
66
        <arg choice="plain"><option>-i
 
67
        <replaceable>NAME</replaceable></option></arg>
 
68
      </group>
 
69
      <sbr/>
 
70
      <group>
 
71
        <arg choice="plain"><option>--address
 
72
        <replaceable>ADDRESS</replaceable></option></arg>
 
73
        <arg choice="plain"><option>-a
 
74
        <replaceable>ADDRESS</replaceable></option></arg>
 
75
      </group>
 
76
      <sbr/>
 
77
      <group>
 
78
        <arg choice="plain"><option>--port
 
79
        <replaceable>PORT</replaceable></option></arg>
 
80
        <arg choice="plain"><option>-p
 
81
        <replaceable>PORT</replaceable></option></arg>
 
82
      </group>
 
83
      <sbr/>
 
84
      <arg><option>--priority
 
85
      <replaceable>PRIORITY</replaceable></option></arg>
 
86
      <sbr/>
 
87
      <arg><option>--servicename
 
88
      <replaceable>NAME</replaceable></option></arg>
 
89
      <sbr/>
 
90
      <arg><option>--configdir
 
91
      <replaceable>DIRECTORY</replaceable></option></arg>
 
92
      <sbr/>
 
93
      <arg><option>--debug</option></arg>
 
94
      <sbr/>
 
95
      <arg><option>--debuglevel
 
96
      <replaceable>LEVEL</replaceable></option></arg>
 
97
      <sbr/>
 
98
      <arg><option>--no-dbus</option></arg>
 
99
      <sbr/>
 
100
      <arg><option>--no-ipv6</option></arg>
 
101
      <sbr/>
 
102
      <arg><option>--no-restore</option></arg>
 
103
      <sbr/>
 
104
      <arg><option>--statedir
 
105
      <replaceable>DIRECTORY</replaceable></option></arg>
 
106
      <sbr/>
 
107
      <arg><option>--socket
 
108
      <replaceable>FD</replaceable></option></arg>
 
109
      <sbr/>
 
110
      <arg><option>--foreground</option></arg>
 
111
      <sbr/>
 
112
      <arg><option>--no-zeroconf</option></arg>
94
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    </cmdsynopsis>
95
114
    <cmdsynopsis>
96
115
      <command>&COMMANDNAME;</command>
97
116
      <group choice="req">
98
 
        <arg choice="plain">-h</arg>
99
 
        <arg choice="plain">--help</arg>
 
117
        <arg choice="plain"><option>--help</option></arg>
 
118
        <arg choice="plain"><option>-h</option></arg>
100
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      </group>
101
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    </cmdsynopsis>
102
121
    <cmdsynopsis>
103
122
      <command>&COMMANDNAME;</command>
104
 
      <arg choice="plain">--version</arg>
 
123
      <arg choice="plain"><option>--version</option></arg>
105
124
    </cmdsynopsis>
106
125
    <cmdsynopsis>
107
126
      <command>&COMMANDNAME;</command>
108
 
      <arg choice="plain">--check</arg>
 
127
      <arg choice="plain"><option>--check</option></arg>
109
128
    </cmdsynopsis>
110
129
  </refsynopsisdiv>
111
 
 
 
130
  
112
131
  <refsect1 id="description">
113
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    <title>DESCRIPTION</title>
114
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    <para>
115
134
      <command>&COMMANDNAME;</command> is a server daemon which
116
135
      handles incoming request for passwords for a pre-defined list of
117
 
      client host computers.  The Mandos server uses Zeroconf to
118
 
      announce itself on the local network, and uses TLS to
119
 
      communicate securely with and to authenticate the clients.  The
120
 
      Mandos server uses IPv6 to allow Mandos clients to use IPv6
121
 
      link-local addresses, since the clients will probably not have
122
 
      any other addresses configured (see <xref linkend="overview"/>).
123
 
      Any authenticated client is then given the stored pre-encrypted
124
 
      password for that specific client.
 
136
      client host computers. For an introduction, see
 
137
      <citerefentry><refentrytitle>intro</refentrytitle>
 
138
      <manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
 
139
      uses Zeroconf to announce itself on the local network, and uses
 
140
      TLS to communicate securely with and to authenticate the
 
141
      clients.  The Mandos server uses IPv6 to allow Mandos clients to
 
142
      use IPv6 link-local addresses, since the clients will probably
 
143
      not have any other addresses configured (see <xref
 
144
      linkend="overview"/>).  Any authenticated client is then given
 
145
      the stored pre-encrypted password for that specific client.
125
146
    </para>
126
 
 
127
147
  </refsect1>
128
148
  
129
149
  <refsect1 id="purpose">
130
150
    <title>PURPOSE</title>
131
 
 
132
151
    <para>
133
152
      The purpose of this is to enable <emphasis>remote and unattended
134
153
      rebooting</emphasis> of client host computer with an
135
154
      <emphasis>encrypted root file system</emphasis>.  See <xref
136
155
      linkend="overview"/> for details.
137
156
    </para>
138
 
 
139
157
  </refsect1>
140
158
  
141
159
  <refsect1 id="options">
142
160
    <title>OPTIONS</title>
143
 
 
144
161
    <variablelist>
145
162
      <varlistentry>
 
163
        <term><option>--help</option></term>
146
164
        <term><option>-h</option></term>
147
 
        <term><option>--help</option></term>
148
165
        <listitem>
149
166
          <para>
150
167
            Show a help message and exit
151
168
          </para>
152
169
        </listitem>
153
170
      </varlistentry>
154
 
 
 
171
      
155
172
      <varlistentry>
 
173
        <term><option>--interface</option>
 
174
        <replaceable>NAME</replaceable></term>
156
175
        <term><option>-i</option>
157
176
        <replaceable>NAME</replaceable></term>
158
 
        <term><option>--interface</option>
159
 
        <replaceable>NAME</replaceable></term>
160
177
        <listitem>
161
178
          <xi:include href="mandos-options.xml" xpointer="interface"/>
162
179
        </listitem>
163
180
      </varlistentry>
164
 
 
 
181
      
165
182
      <varlistentry>
166
 
        <term><literal>-a</literal>, <literal>--address <replaceable>
167
 
        ADDRESS</replaceable></literal></term>
 
183
        <term><option>--address
 
184
        <replaceable>ADDRESS</replaceable></option></term>
 
185
        <term><option>-a
 
186
        <replaceable>ADDRESS</replaceable></option></term>
168
187
        <listitem>
169
188
          <xi:include href="mandos-options.xml" xpointer="address"/>
170
189
        </listitem>
171
190
      </varlistentry>
172
 
 
 
191
      
173
192
      <varlistentry>
174
 
        <term><literal>-p</literal>, <literal>--port <replaceable>
175
 
        PORT</replaceable></literal></term>
 
193
        <term><option>--port
 
194
        <replaceable>PORT</replaceable></option></term>
 
195
        <term><option>-p
 
196
        <replaceable>PORT</replaceable></option></term>
176
197
        <listitem>
177
198
          <xi:include href="mandos-options.xml" xpointer="port"/>
178
199
        </listitem>
179
200
      </varlistentry>
180
 
 
 
201
      
181
202
      <varlistentry>
182
 
        <term><literal>--check</literal></term>
 
203
        <term><option>--check</option></term>
183
204
        <listitem>
184
205
          <para>
185
206
            Run the server’s self-tests.  This includes any unit
187
208
          </para>
188
209
        </listitem>
189
210
      </varlistentry>
190
 
 
 
211
      
191
212
      <varlistentry>
192
 
        <term><literal>--debug</literal></term>
 
213
        <term><option>--debug</option></term>
193
214
        <listitem>
194
215
          <xi:include href="mandos-options.xml" xpointer="debug"/>
195
216
        </listitem>
196
217
      </varlistentry>
197
 
 
198
 
      <varlistentry>
199
 
        <term><literal>--priority <replaceable>
200
 
        PRIORITY</replaceable></literal></term>
 
218
      
 
219
      <varlistentry>
 
220
        <term><option>--debuglevel
 
221
        <replaceable>LEVEL</replaceable></option></term>
 
222
        <listitem>
 
223
          <para>
 
224
            Set the debugging log level.
 
225
            <replaceable>LEVEL</replaceable> is a string, one of
 
226
            <quote><literal>CRITICAL</literal></quote>,
 
227
            <quote><literal>ERROR</literal></quote>,
 
228
            <quote><literal>WARNING</literal></quote>,
 
229
            <quote><literal>INFO</literal></quote>, or
 
230
            <quote><literal>DEBUG</literal></quote>, in order of
 
231
            increasing verbosity.  The default level is
 
232
            <quote><literal>WARNING</literal></quote>.
 
233
          </para>
 
234
        </listitem>
 
235
      </varlistentry>
 
236
      
 
237
      <varlistentry>
 
238
        <term><option>--priority <replaceable>
 
239
        PRIORITY</replaceable></option></term>
201
240
        <listitem>
202
241
          <xi:include href="mandos-options.xml" xpointer="priority"/>
203
242
        </listitem>
204
243
      </varlistentry>
205
 
 
 
244
      
206
245
      <varlistentry>
207
 
        <term><literal>--servicename <replaceable>NAME</replaceable>
208
 
        </literal></term>
 
246
        <term><option>--servicename
 
247
        <replaceable>NAME</replaceable></option></term>
209
248
        <listitem>
210
249
          <xi:include href="mandos-options.xml"
211
250
                      xpointer="servicename"/>
212
251
        </listitem>
213
252
      </varlistentry>
214
 
 
 
253
      
215
254
      <varlistentry>
216
 
        <term><literal>--configdir <replaceable>DIR</replaceable>
217
 
        </literal></term>
 
255
        <term><option>--configdir
 
256
        <replaceable>DIRECTORY</replaceable></option></term>
218
257
        <listitem>
219
258
          <para>
220
259
            Directory to search for configuration files.  Default is
226
265
          </para>
227
266
        </listitem>
228
267
      </varlistentry>
229
 
 
 
268
      
230
269
      <varlistentry>
231
 
        <term><literal>--version</literal></term>
 
270
        <term><option>--version</option></term>
232
271
        <listitem>
233
272
          <para>
234
273
            Prints the program version and exit.
235
274
          </para>
236
275
        </listitem>
237
276
      </varlistentry>
 
277
      
 
278
      <varlistentry>
 
279
        <term><option>--no-dbus</option></term>
 
280
        <listitem>
 
281
          <xi:include href="mandos-options.xml" xpointer="dbus"/>
 
282
          <para>
 
283
            See also <xref linkend="dbus_interface"/>.
 
284
          </para>
 
285
        </listitem>
 
286
      </varlistentry>
 
287
      
 
288
      <varlistentry>
 
289
        <term><option>--no-ipv6</option></term>
 
290
        <listitem>
 
291
          <xi:include href="mandos-options.xml" xpointer="ipv6"/>
 
292
        </listitem>
 
293
      </varlistentry>
 
294
      
 
295
      <varlistentry>
 
296
        <term><option>--no-restore</option></term>
 
297
        <listitem>
 
298
          <xi:include href="mandos-options.xml" xpointer="restore"/>
 
299
          <para>
 
300
            See also <xref linkend="persistent_state"/>.
 
301
          </para>
 
302
        </listitem>
 
303
      </varlistentry>
 
304
      
 
305
      <varlistentry>
 
306
        <term><option>--statedir
 
307
        <replaceable>DIRECTORY</replaceable></option></term>
 
308
        <listitem>
 
309
          <xi:include href="mandos-options.xml" xpointer="statedir"/>
 
310
        </listitem>
 
311
      </varlistentry>
 
312
      
 
313
      <varlistentry>
 
314
        <term><option>--socket
 
315
        <replaceable>FD</replaceable></option></term>
 
316
        <listitem>
 
317
          <xi:include href="mandos-options.xml" xpointer="socket"/>
 
318
        </listitem>
 
319
      </varlistentry>
 
320
      
 
321
      <varlistentry>
 
322
        <term><option>--foreground</option></term>
 
323
        <listitem>
 
324
          <xi:include href="mandos-options.xml"
 
325
                      xpointer="foreground"/>
 
326
        </listitem>
 
327
      </varlistentry>
 
328
      
 
329
      <varlistentry>
 
330
        <term><option>--no-zeroconf</option></term>
 
331
        <listitem>
 
332
          <xi:include href="mandos-options.xml" xpointer="zeroconf"/>
 
333
        </listitem>
 
334
      </varlistentry>
 
335
      
238
336
    </variablelist>
239
337
  </refsect1>
240
 
 
 
338
  
241
339
  <refsect1 id="overview">
242
340
    <title>OVERVIEW</title>
243
341
    <xi:include href="overview.xml"/>
244
342
    <para>
245
343
      This program is the server part.  It is a normal server program
246
344
      and will run in a normal system environment, not in an initial
247
 
      RAM disk environment.
 
345
      <acronym>RAM</acronym> disk environment.
248
346
    </para>
249
347
  </refsect1>
250
 
 
 
348
  
251
349
  <refsect1 id="protocol">
252
350
    <title>NETWORK PROTOCOL</title>
253
351
    <para>
305
403
      </row>
306
404
    </tbody></tgroup></table>
307
405
  </refsect1>
308
 
 
 
406
  
309
407
  <refsect1 id="checking">
310
408
    <title>CHECKING</title>
311
409
    <para>
312
410
      The server will, by default, continually check that the clients
313
411
      are still up.  If a client has not been confirmed as being up
314
412
      for some time, the client is assumed to be compromised and is no
315
 
      longer eligible to receive the encrypted password.  The timeout,
316
 
      checker program, and interval between checks can be configured
317
 
      both globally and per client; see <citerefentry>
 
413
      longer eligible to receive the encrypted password.  (Manual
 
414
      intervention is required to re-enable a client.)  The timeout,
 
415
      extended timeout, checker program, and interval between checks
 
416
      can be configured both globally and per client; see
 
417
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
418
      <manvolnum>5</manvolnum></citerefentry>.
 
419
    </para>
 
420
  </refsect1>
 
421
  
 
422
  <refsect1 id="approval">
 
423
    <title>APPROVAL</title>
 
424
    <para>
 
425
      The server can be configured to require manual approval for a
 
426
      client before it is sent its secret.  The delay to wait for such
 
427
      approval and the default action (approve or deny) can be
 
428
      configured both globally and per client; see <citerefentry>
318
429
      <refentrytitle>mandos-clients.conf</refentrytitle>
319
 
      <manvolnum>5</manvolnum></citerefentry>.
320
 
    </para>
 
430
      <manvolnum>5</manvolnum></citerefentry>.  By default all clients
 
431
      will be approved immediately without delay.
 
432
    </para>
 
433
    <para>
 
434
      This can be used to deny a client its secret if not manually
 
435
      approved within a specified time.  It can also be used to make
 
436
      the server delay before giving a client its secret, allowing
 
437
      optional manual denying of this specific client.
 
438
    </para>
 
439
    
321
440
  </refsect1>
322
 
 
 
441
  
323
442
  <refsect1 id="logging">
324
443
    <title>LOGGING</title>
325
444
    <para>
326
445
      The server will send log message with various severity levels to
327
 
      <filename>/dev/log</filename>.  With the
 
446
      <filename class="devicefile">/dev/log</filename>.  With the
328
447
      <option>--debug</option> option, it will log even more messages,
329
448
      and also show them on the console.
330
449
    </para>
331
450
  </refsect1>
332
 
 
 
451
  
 
452
  <refsect1 id="persistent_state">
 
453
    <title>PERSISTENT STATE</title>
 
454
    <para>
 
455
      Client settings, initially read from
 
456
      <filename>clients.conf</filename>, are persistent across
 
457
      restarts, and run-time changes will override settings in
 
458
      <filename>clients.conf</filename>.  However, if a setting is
 
459
      <emphasis>changed</emphasis> (or a client added, or removed) in
 
460
      <filename>clients.conf</filename>, this will take precedence.
 
461
    </para>
 
462
  </refsect1>
 
463
  
 
464
  <refsect1 id="dbus_interface">
 
465
    <title>D-BUS INTERFACE</title>
 
466
    <para>
 
467
      The server will by default provide a D-Bus system bus interface.
 
468
      This interface will only be accessible by the root user or a
 
469
      Mandos-specific user, if such a user exists.  For documentation
 
470
      of the D-Bus API, see the file <filename>DBUS-API</filename>.
 
471
    </para>
 
472
  </refsect1>
 
473
  
333
474
  <refsect1 id="exit_status">
334
475
    <title>EXIT STATUS</title>
335
476
    <para>
337
478
      critical error is encountered.
338
479
    </para>
339
480
  </refsect1>
340
 
 
 
481
  
341
482
  <refsect1 id="environment">
342
483
    <title>ENVIRONMENT</title>
343
484
    <variablelist>
344
485
      <varlistentry>
345
 
        <term><varname>PATH</varname></term>
 
486
        <term><envar>PATH</envar></term>
346
487
        <listitem>
347
488
          <para>
348
489
            To start the configured checker (see <xref
357
498
      </varlistentry>
358
499
    </variablelist>
359
500
  </refsect1>
360
 
 
361
 
  <refsect1 id="file">
 
501
  
 
502
  <refsect1 id="files">
362
503
    <title>FILES</title>
363
504
    <para>
364
505
      Use the <option>--configdir</option> option to change where
387
528
        </listitem>
388
529
      </varlistentry>
389
530
      <varlistentry>
390
 
        <term><filename>/var/run/mandos/mandos.pid</filename></term>
391
 
        <listitem>
392
 
          <para>
393
 
            The file containing the process id of
394
 
            <command>&COMMANDNAME;</command>.
 
531
        <term><filename>/run/mandos.pid</filename></term>
 
532
        <listitem>
 
533
          <para>
 
534
            The file containing the process id of the
 
535
            <command>&COMMANDNAME;</command> process started last.
 
536
            <emphasis >Note:</emphasis> If the <filename
 
537
            class="directory">/run</filename> directory does not
 
538
            exist, <filename>/var/run/mandos.pid</filename> will be
 
539
            used instead.
 
540
          </para>
 
541
        </listitem>
 
542
      </varlistentry>
 
543
      <varlistentry>
 
544
        <term><filename class="devicefile">/dev/log</filename></term>
 
545
      </varlistentry>
 
546
      <varlistentry>
 
547
        <term><filename
 
548
        class="directory">/var/lib/mandos</filename></term>
 
549
        <listitem>
 
550
          <para>
 
551
            Directory where persistent state will be saved.  Change
 
552
            this with the <option>--statedir</option> option.  See
 
553
            also the <option>--no-restore</option> option.
395
554
          </para>
396
555
        </listitem>
397
556
      </varlistentry>
425
584
      backtrace.  This could be considered a feature.
426
585
    </para>
427
586
    <para>
428
 
      Currently, if a client is declared <quote>invalid</quote> due to
429
 
      having timed out, the server does not record this fact onto
430
 
      permanent storage.  This has some security implications, see
431
 
      <xref linkend="CLIENTS"/>.
432
 
    </para>
433
 
    <para>
434
 
      There is currently no way of querying the server of the current
435
 
      status of clients, other than analyzing its <systemitem
436
 
      class="service">syslog</systemitem> output.
437
 
    </para>
438
 
    <para>
439
587
      There is no fine-grained control over logging and debug output.
440
588
    </para>
441
589
    <para>
442
 
      Debug mode is conflated with running in the foreground.
443
 
    </para>
444
 
    <para>
445
 
      The console log messages does not show a timestamp.
 
590
      This server does not check the expire time of clients’ OpenPGP
 
591
      keys.
446
592
    </para>
447
593
  </refsect1>
448
594
  
459
605
    <informalexample>
460
606
      <para>
461
607
        Run the server in debug mode, read configuration files from
462
 
        the <filename>~/mandos</filename> directory, and use the
463
 
        Zeroconf service name <quote>Test</quote> to not collide with
464
 
        any other official Mandos server on this host:
 
608
        the <filename class="directory">~/mandos</filename> directory,
 
609
        and use the Zeroconf service name <quote>Test</quote> to not
 
610
        collide with any other official Mandos server on this host:
465
611
      </para>
466
612
      <para>
467
613
 
483
629
      </para>
484
630
    </informalexample>
485
631
  </refsect1>
486
 
 
 
632
  
487
633
  <refsect1 id="security">
488
634
    <title>SECURITY</title>
489
 
    <refsect2 id="SERVER">
 
635
    <refsect2 id="server">
490
636
      <title>SERVER</title>
491
637
      <para>
492
638
        Running this <command>&COMMANDNAME;</command> server program
493
639
        should not in itself present any security risk to the host
494
 
        computer running it.  The program does not need any special
495
 
        privileges to run, and is designed to run as a non-root user.
 
640
        computer running it.  The program switches to a non-root user
 
641
        soon after startup.
496
642
      </para>
497
643
    </refsect2>
498
 
    <refsect2 id="CLIENTS">
 
644
    <refsect2 id="clients">
499
645
      <title>CLIENTS</title>
500
646
      <para>
501
647
        The server only gives out its stored data to clients which
508
654
        <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
509
655
        <manvolnum>5</manvolnum></citerefentry>)
510
656
        <emphasis>must</emphasis> be made non-readable by anyone
511
 
        except the user running the server.
 
657
        except the user starting the server (usually root).
512
658
      </para>
513
659
      <para>
514
660
        As detailed in <xref linkend="checking"/>, the status of all
516
662
        compromised if they are gone for too long.
517
663
      </para>
518
664
      <para>
519
 
        If a client is compromised, its downtime should be duly noted
520
 
        by the server which would therefore declare the client
521
 
        invalid.  But if the server was ever restarted, it would
522
 
        re-read its client list from its configuration file and again
523
 
        regard all clients therein as valid, and hence eligible to
524
 
        receive their passwords.  Therefore, be careful when
525
 
        restarting servers if it is suspected that a client has, in
526
 
        fact, been compromised by parties who may now be running a
527
 
        fake Mandos client with the keys from the non-encrypted
528
 
        initial RAM image of the client host.  What should be done in
529
 
        that case (if restarting the server program really is
530
 
        necessary) is to stop the server program, edit the
531
 
        configuration file to omit any suspect clients, and restart
532
 
        the server program.
533
 
      </para>
534
 
      <para>
535
665
        For more details on client-side security, see
536
 
        <citerefentry><refentrytitle>password-request</refentrytitle>
 
666
        <citerefentry><refentrytitle>mandos-client</refentrytitle>
537
667
        <manvolnum>8mandos</manvolnum></citerefentry>.
538
668
      </para>
539
669
    </refsect2>
540
670
  </refsect1>
541
 
 
 
671
  
542
672
  <refsect1 id="see_also">
543
673
    <title>SEE ALSO</title>
544
674
    <para>
545
 
      <citerefentry>
546
 
        <refentrytitle>mandos-clients.conf</refentrytitle>
547
 
        <manvolnum>5</manvolnum></citerefentry>, <citerefentry>
548
 
        <refentrytitle>mandos.conf</refentrytitle>
549
 
        <manvolnum>5</manvolnum></citerefentry>, <citerefentry>
550
 
        <refentrytitle>password-request</refentrytitle>
551
 
        <manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
552
 
        <refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
553
 
      </citerefentry>
 
675
      <citerefentry><refentrytitle>intro</refentrytitle>
 
676
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
677
      <citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
 
678
      <manvolnum>5</manvolnum></citerefentry>,
 
679
      <citerefentry><refentrytitle>mandos.conf</refentrytitle>
 
680
      <manvolnum>5</manvolnum></citerefentry>,
 
681
      <citerefentry><refentrytitle>mandos-client</refentrytitle>
 
682
      <manvolnum>8mandos</manvolnum></citerefentry>,
 
683
      <citerefentry><refentrytitle>sh</refentrytitle>
 
684
      <manvolnum>1</manvolnum></citerefentry>
554
685
    </para>
555
686
    <variablelist>
556
687
      <varlistentry>
577
708
      </varlistentry>
578
709
      <varlistentry>
579
710
        <term>
580
 
          <ulink url="http://www.gnu.org/software/gnutls/"
581
 
          >GnuTLS</ulink>
 
711
          <ulink url="http://gnutls.org/">GnuTLS</ulink>
582
712
        </term>
583
713
      <listitem>
584
714
        <para>
622
752
      </varlistentry>
623
753
      <varlistentry>
624
754
        <term>
625
 
          RFC 4346: <citetitle>The Transport Layer Security (TLS)
626
 
          Protocol Version 1.1</citetitle>
 
755
          RFC 5246: <citetitle>The Transport Layer Security (TLS)
 
756
          Protocol Version 1.2</citetitle>
627
757
        </term>
628
758
      <listitem>
629
759
        <para>
630
 
          TLS 1.1 is the protocol implemented by GnuTLS.
 
760
          TLS 1.2 is the protocol implemented by GnuTLS.
631
761
        </para>
632
762
      </listitem>
633
763
      </varlistentry>
643
773
      </varlistentry>
644
774
      <varlistentry>
645
775
        <term>
646
 
          RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
647
 
          Security</citetitle>
 
776
          RFC 6091: <citetitle>Using OpenPGP Keys for Transport Layer
 
777
          Security (TLS) Authentication</citetitle>
648
778
        </term>
649
779
      <listitem>
650
780
        <para>