1
1
<?xml version="1.0" encoding="UTF-8"?>
2
2
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3
3
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4
<!ENTITY VERSION "1.0">
5
4
<!ENTITY COMMANDNAME "mandos">
6
<!ENTITY TIMESTAMP "2008-08-29">
5
<!ENTITY TIMESTAMP "2017-02-23">
6
<!ENTITY % common SYSTEM "common.ent">
9
10
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
11
<title>&COMMANDNAME;</title>
12
<title>Mandos Manual</title>
12
13
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
13
<productname>&COMMANDNAME;</productname>
14
<productnumber>&VERSION;</productnumber>
14
<productname>Mandos</productname>
15
<productnumber>&version;</productnumber>
15
16
<date>&TIMESTAMP;</date>
18
19
<firstname>Björn</firstname>
19
20
<surname>Påhlsson</surname>
21
<email>belorn@fukt.bsnet.se</email>
22
<email>belorn@recompile.se</email>
25
26
<firstname>Teddy</firstname>
26
27
<surname>Hogeborn</surname>
28
<email>teddy@fukt.bsnet.se</email>
29
<email>teddy@recompile.se</email>
34
44
<holder>Teddy Hogeborn</holder>
35
45
<holder>Björn Påhlsson</holder>
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
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
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/"/>.
47
<xi:include href="legalnotice.xml"/>
63
51
<refentrytitle>&COMMANDNAME;</refentrytitle>
64
52
<manvolnum>8</manvolnum>
68
56
<refname><command>&COMMANDNAME;</command></refname>
70
Sends encrypted passwords to authenticated Mandos clients
58
Gives encrypted passwords to authenticated Mandos clients
76
64
<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>
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>
66
<arg choice="plain"><option>--interface
67
<replaceable>NAME</replaceable></option></arg>
68
<arg choice="plain"><option>-i
69
<replaceable>NAME</replaceable></option></arg>
73
<arg choice="plain"><option>--address
74
<replaceable>ADDRESS</replaceable></option></arg>
75
<arg choice="plain"><option>-a
76
<replaceable>ADDRESS</replaceable></option></arg>
80
<arg choice="plain"><option>--port
81
<replaceable>PORT</replaceable></option></arg>
82
<arg choice="plain"><option>-p
83
<replaceable>PORT</replaceable></option></arg>
86
<arg><option>--priority
87
<replaceable>PRIORITY</replaceable></option></arg>
89
<arg><option>--servicename
90
<replaceable>NAME</replaceable></option></arg>
92
<arg><option>--configdir
93
<replaceable>DIRECTORY</replaceable></option></arg>
95
<arg><option>--debug</option></arg>
97
<arg><option>--debuglevel
98
<replaceable>LEVEL</replaceable></option></arg>
100
<arg><option>--no-dbus</option></arg>
102
<arg><option>--no-ipv6</option></arg>
104
<arg><option>--no-restore</option></arg>
106
<arg><option>--statedir
107
<replaceable>DIRECTORY</replaceable></option></arg>
109
<arg><option>--socket
110
<replaceable>FD</replaceable></option></arg>
112
<arg><option>--foreground</option></arg>
114
<arg><option>--no-zeroconf</option></arg>
96
117
<command>&COMMANDNAME;</command>
97
118
<group choice="req">
98
<arg choice="plain">-h</arg>
99
<arg choice="plain">--help</arg>
119
<arg choice="plain"><option>--help</option></arg>
120
<arg choice="plain"><option>-h</option></arg>
103
124
<command>&COMMANDNAME;</command>
104
<arg choice="plain">--version</arg>
125
<arg choice="plain"><option>--version</option></arg>
107
128
<command>&COMMANDNAME;</command>
108
<arg choice="plain">--check</arg>
129
<arg choice="plain"><option>--check</option></arg>
110
131
</refsynopsisdiv>
112
133
<refsect1 id="description">
113
134
<title>DESCRIPTION</title>
115
136
<command>&COMMANDNAME;</command> is a server daemon which
116
137
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.
138
client host computers. For an introduction, see
139
<citerefentry><refentrytitle>intro</refentrytitle>
140
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
141
uses Zeroconf to announce itself on the local network, and uses
142
TLS to communicate securely with and to authenticate the
143
clients. The Mandos server uses IPv6 to allow Mandos clients to
144
use IPv6 link-local addresses, since the clients will probably
145
not have any other addresses configured (see <xref
146
linkend="overview"/>). Any authenticated client is then given
147
the stored pre-encrypted password for that specific client.
129
151
<refsect1 id="purpose">
130
152
<title>PURPOSE</title>
133
154
The purpose of this is to enable <emphasis>remote and unattended
134
155
rebooting</emphasis> of client host computer with an
135
156
<emphasis>encrypted root file system</emphasis>. See <xref
136
157
linkend="overview"/> for details.
141
161
<refsect1 id="options">
142
162
<title>OPTIONS</title>
146
<term><literal>-h</literal>, <literal>--help</literal></term>
165
<term><option>--help</option></term>
166
<term><option>-h</option></term>
149
169
Show a help message and exit
155
<term><literal>-i</literal>, <literal>--interface <replaceable
156
>NAME</replaceable></literal></term>
175
<term><option>--interface</option>
176
<replaceable>NAME</replaceable></term>
177
<term><option>-i</option>
178
<replaceable>NAME</replaceable></term>
158
180
<xi:include href="mandos-options.xml" xpointer="interface"/>
163
<term><literal>-a</literal>, <literal>--address <replaceable>
164
ADDRESS</replaceable></literal></term>
185
<term><option>--address
186
<replaceable>ADDRESS</replaceable></option></term>
188
<replaceable>ADDRESS</replaceable></option></term>
166
190
<xi:include href="mandos-options.xml" xpointer="address"/>
171
<term><literal>-p</literal>, <literal>--port <replaceable>
172
PORT</replaceable></literal></term>
196
<replaceable>PORT</replaceable></option></term>
198
<replaceable>PORT</replaceable></option></term>
174
200
<xi:include href="mandos-options.xml" xpointer="port"/>
179
<term><literal>--check</literal></term>
205
<term><option>--check</option></term>
182
208
Run the server’s self-tests. This includes any unit
189
<term><literal>--debug</literal></term>
215
<term><option>--debug</option></term>
191
217
<xi:include href="mandos-options.xml" xpointer="debug"/>
196
<term><literal>--priority <replaceable>
197
PRIORITY</replaceable></literal></term>
222
<term><option>--debuglevel
223
<replaceable>LEVEL</replaceable></option></term>
226
Set the debugging log level.
227
<replaceable>LEVEL</replaceable> is a string, one of
228
<quote><literal>CRITICAL</literal></quote>,
229
<quote><literal>ERROR</literal></quote>,
230
<quote><literal>WARNING</literal></quote>,
231
<quote><literal>INFO</literal></quote>, or
232
<quote><literal>DEBUG</literal></quote>, in order of
233
increasing verbosity. The default level is
234
<quote><literal>WARNING</literal></quote>.
240
<term><option>--priority <replaceable>
241
PRIORITY</replaceable></option></term>
199
243
<xi:include href="mandos-options.xml" xpointer="priority"/>
204
<term><literal>--servicename <replaceable>NAME</replaceable>
248
<term><option>--servicename
249
<replaceable>NAME</replaceable></option></term>
207
251
<xi:include href="mandos-options.xml"
208
252
xpointer="servicename"/>
213
<term><literal>--configdir <replaceable>DIR</replaceable>
257
<term><option>--configdir
258
<replaceable>DIRECTORY</replaceable></option></term>
217
261
Directory to search for configuration files. Default is
228
<term><literal>--version</literal></term>
272
<term><option>--version</option></term>
231
275
Prints the program version and exit.
281
<term><option>--no-dbus</option></term>
283
<xi:include href="mandos-options.xml" xpointer="dbus"/>
285
See also <xref linkend="dbus_interface"/>.
291
<term><option>--no-ipv6</option></term>
293
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
298
<term><option>--no-restore</option></term>
300
<xi:include href="mandos-options.xml" xpointer="restore"/>
302
See also <xref linkend="persistent_state"/>.
308
<term><option>--statedir
309
<replaceable>DIRECTORY</replaceable></option></term>
311
<xi:include href="mandos-options.xml" xpointer="statedir"/>
316
<term><option>--socket
317
<replaceable>FD</replaceable></option></term>
319
<xi:include href="mandos-options.xml" xpointer="socket"/>
324
<term><option>--foreground</option></term>
326
<xi:include href="mandos-options.xml"
327
xpointer="foreground"/>
332
<term><option>--no-zeroconf</option></term>
334
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
238
341
<refsect1 id="overview">
239
342
<title>OVERVIEW</title>
240
343
<xi:include href="overview.xml"/>
242
345
This program is the server part. It is a normal server program
243
346
and will run in a normal system environment, not in an initial
244
RAM disk environment.
347
<acronym>RAM</acronym> disk environment.
248
351
<refsect1 id="protocol">
249
352
<title>NETWORK PROTOCOL</title>
303
406
</tbody></tgroup></table>
306
409
<refsect1 id="checking">
307
410
<title>CHECKING</title>
309
412
The server will, by default, continually check that the clients
310
413
are still up. If a client has not been confirmed as being up
311
414
for some time, the client is assumed to be compromised and is no
312
longer eligible to receive the encrypted password. The timeout,
313
checker program, and interval between checks can be configured
314
both globally and per client; see <citerefentry>
415
longer eligible to receive the encrypted password. (Manual
416
intervention is required to re-enable a client.) The timeout,
417
extended timeout, checker program, and interval between checks
418
can be configured both globally and per client; see
419
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
420
<manvolnum>5</manvolnum></citerefentry>.
424
<refsect1 id="approval">
425
<title>APPROVAL</title>
427
The server can be configured to require manual approval for a
428
client before it is sent its secret. The delay to wait for such
429
approval and the default action (approve or deny) can be
430
configured both globally and per client; see <citerefentry>
315
431
<refentrytitle>mandos-clients.conf</refentrytitle>
316
<manvolnum>5</manvolnum></citerefentry>.
432
<manvolnum>5</manvolnum></citerefentry>. By default all clients
433
will be approved immediately without delay.
436
This can be used to deny a client its secret if not manually
437
approved within a specified time. It can also be used to make
438
the server delay before giving a client its secret, allowing
439
optional manual denying of this specific client.
320
444
<refsect1 id="logging">
321
445
<title>LOGGING</title>
323
447
The server will send log message with various severity levels to
324
<filename>/dev/log</filename>. With the
448
<filename class="devicefile">/dev/log</filename>. With the
325
449
<option>--debug</option> option, it will log even more messages,
326
450
and also show them on the console.
454
<refsect1 id="persistent_state">
455
<title>PERSISTENT STATE</title>
457
Client settings, initially read from
458
<filename>clients.conf</filename>, are persistent across
459
restarts, and run-time changes will override settings in
460
<filename>clients.conf</filename>. However, if a setting is
461
<emphasis>changed</emphasis> (or a client added, or removed) in
462
<filename>clients.conf</filename>, this will take precedence.
466
<refsect1 id="dbus_interface">
467
<title>D-BUS INTERFACE</title>
469
The server will by default provide a D-Bus system bus interface.
470
This interface will only be accessible by the root user or a
471
Mandos-specific user, if such a user exists. For documentation
472
of the D-Bus API, see the file <filename>DBUS-API</filename>.
330
476
<refsect1 id="exit_status">
331
477
<title>EXIT STATUS</title>
513
662
compromised if they are gone for too long.
516
If a client is compromised, its downtime should be duly noted
517
by the server which would therefore declare the client
518
invalid. But if the server was ever restarted, it would
519
re-read its client list from its configuration file and again
520
regard all clients therein as valid, and hence eligible to
521
receive their passwords. Therefore, be careful when
522
restarting servers if it is suspected that a client has, in
523
fact, been compromised by parties who may now be running a
524
fake Mandos client with the keys from the non-encrypted
525
initial RAM image of the client host. What should be done in
526
that case (if restarting the server program really is
527
necessary) is to stop the server program, edit the
528
configuration file to omit any suspect clients, and restart
532
665
For more details on client-side security, see
533
<citerefentry><refentrytitle>password-request</refentrytitle>
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
534
667
<manvolnum>8mandos</manvolnum></citerefentry>.
539
672
<refsect1 id="see_also">
540
673
<title>SEE ALSO</title>
543
<refentrytitle>mandos.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>mandos-clients.conf</refentrytitle>
546
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
547
<refentrytitle>password-request</refentrytitle>
548
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
549
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
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>