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 "2013-10-20">
6
<!ENTITY % common SYSTEM "common.ent">
9
10
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
11
12
<title>Mandos Manual</title>
12
13
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
13
14
<productname>Mandos</productname>
14
<productnumber>&VERSION;</productnumber>
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
40
<holder>Teddy Hogeborn</holder>
35
41
<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/"/>.
43
<xi:include href="legalnotice.xml"/>
63
47
<refentrytitle>&COMMANDNAME;</refentrytitle>
64
48
<manvolnum>8</manvolnum>
68
52
<refname><command>&COMMANDNAME;</command></refname>
70
Sends encrypted passwords to authenticated Mandos clients
54
Gives encrypted passwords to authenticated Mandos clients
76
60
<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>
62
<arg choice="plain"><option>--interface
63
<replaceable>NAME</replaceable></option></arg>
64
<arg choice="plain"><option>-i
65
<replaceable>NAME</replaceable></option></arg>
69
<arg choice="plain"><option>--address
70
<replaceable>ADDRESS</replaceable></option></arg>
71
<arg choice="plain"><option>-a
72
<replaceable>ADDRESS</replaceable></option></arg>
76
<arg choice="plain"><option>--port
77
<replaceable>PORT</replaceable></option></arg>
78
<arg choice="plain"><option>-p
79
<replaceable>PORT</replaceable></option></arg>
82
<arg><option>--priority
83
<replaceable>PRIORITY</replaceable></option></arg>
85
<arg><option>--servicename
86
<replaceable>NAME</replaceable></option></arg>
88
<arg><option>--configdir
89
<replaceable>DIRECTORY</replaceable></option></arg>
91
<arg><option>--debug</option></arg>
93
<arg><option>--debuglevel
94
<replaceable>LEVEL</replaceable></option></arg>
96
<arg><option>--no-dbus</option></arg>
98
<arg><option>--no-ipv6</option></arg>
100
<arg><option>--no-restore</option></arg>
102
<arg><option>--statedir
103
<replaceable>DIRECTORY</replaceable></option></arg>
105
<arg><option>--socket
106
<replaceable>FD</replaceable></option></arg>
108
<arg><option>--foreground</option></arg>
96
111
<command>&COMMANDNAME;</command>
97
112
<group choice="req">
98
<arg choice="plain">-h</arg>
99
<arg choice="plain">--help</arg>
113
<arg choice="plain"><option>--help</option></arg>
114
<arg choice="plain"><option>-h</option></arg>
103
118
<command>&COMMANDNAME;</command>
104
<arg choice="plain">--version</arg>
119
<arg choice="plain"><option>--version</option></arg>
107
122
<command>&COMMANDNAME;</command>
108
<arg choice="plain">--check</arg>
123
<arg choice="plain"><option>--check</option></arg>
110
125
</refsynopsisdiv>
112
127
<refsect1 id="description">
113
128
<title>DESCRIPTION</title>
115
130
<command>&COMMANDNAME;</command> is a server daemon which
116
131
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.
132
client host computers. For an introduction, see
133
<citerefentry><refentrytitle>intro</refentrytitle>
134
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
135
uses Zeroconf to announce itself on the local network, and uses
136
TLS to communicate securely with and to authenticate the
137
clients. The Mandos server uses IPv6 to allow Mandos clients to
138
use IPv6 link-local addresses, since the clients will probably
139
not have any other addresses configured (see <xref
140
linkend="overview"/>). Any authenticated client is then given
141
the stored pre-encrypted password for that specific client.
129
145
<refsect1 id="purpose">
130
146
<title>PURPOSE</title>
133
148
The purpose of this is to enable <emphasis>remote and unattended
134
149
rebooting</emphasis> of client host computer with an
135
150
<emphasis>encrypted root file system</emphasis>. See <xref
136
151
linkend="overview"/> for details.
141
155
<refsect1 id="options">
142
156
<title>OPTIONS</title>
146
<term><literal>-h</literal>, <literal>--help</literal></term>
159
<term><option>--help</option></term>
160
<term><option>-h</option></term>
149
163
Show a help message and exit
155
<term><literal>-i</literal>, <literal>--interface <replaceable
156
>NAME</replaceable></literal></term>
169
<term><option>--interface</option>
170
<replaceable>NAME</replaceable></term>
171
<term><option>-i</option>
172
<replaceable>NAME</replaceable></term>
158
174
<xi:include href="mandos-options.xml" xpointer="interface"/>
163
<term><literal>-a</literal>, <literal>--address <replaceable>
164
ADDRESS</replaceable></literal></term>
179
<term><option>--address
180
<replaceable>ADDRESS</replaceable></option></term>
182
<replaceable>ADDRESS</replaceable></option></term>
166
184
<xi:include href="mandos-options.xml" xpointer="address"/>
171
<term><literal>-p</literal>, <literal>--port <replaceable>
172
PORT</replaceable></literal></term>
190
<replaceable>PORT</replaceable></option></term>
192
<replaceable>PORT</replaceable></option></term>
174
194
<xi:include href="mandos-options.xml" xpointer="port"/>
179
<term><literal>--check</literal></term>
199
<term><option>--check</option></term>
182
202
Run the server’s self-tests. This includes any unit
189
<term><literal>--debug</literal></term>
209
<term><option>--debug</option></term>
191
211
<xi:include href="mandos-options.xml" xpointer="debug"/>
196
<term><literal>--priority <replaceable>
197
PRIORITY</replaceable></literal></term>
216
<term><option>--debuglevel
217
<replaceable>LEVEL</replaceable></option></term>
220
Set the debugging log level.
221
<replaceable>LEVEL</replaceable> is a string, one of
222
<quote><literal>CRITICAL</literal></quote>,
223
<quote><literal>ERROR</literal></quote>,
224
<quote><literal>WARNING</literal></quote>,
225
<quote><literal>INFO</literal></quote>, or
226
<quote><literal>DEBUG</literal></quote>, in order of
227
increasing verbosity. The default level is
228
<quote><literal>WARNING</literal></quote>.
234
<term><option>--priority <replaceable>
235
PRIORITY</replaceable></option></term>
199
237
<xi:include href="mandos-options.xml" xpointer="priority"/>
204
<term><literal>--servicename <replaceable>NAME</replaceable>
242
<term><option>--servicename
243
<replaceable>NAME</replaceable></option></term>
207
245
<xi:include href="mandos-options.xml"
208
246
xpointer="servicename"/>
213
<term><literal>--configdir <replaceable>DIR</replaceable>
251
<term><option>--configdir
252
<replaceable>DIRECTORY</replaceable></option></term>
217
255
Directory to search for configuration files. Default is
228
<term><literal>--version</literal></term>
266
<term><option>--version</option></term>
231
269
Prints the program version and exit.
275
<term><option>--no-dbus</option></term>
277
<xi:include href="mandos-options.xml" xpointer="dbus"/>
279
See also <xref linkend="dbus_interface"/>.
285
<term><option>--no-ipv6</option></term>
287
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
292
<term><option>--no-restore</option></term>
294
<xi:include href="mandos-options.xml" xpointer="restore"/>
296
See also <xref linkend="persistent_state"/>.
302
<term><option>--statedir
303
<replaceable>DIRECTORY</replaceable></option></term>
305
<xi:include href="mandos-options.xml" xpointer="statedir"/>
310
<term><option>--socket
311
<replaceable>FD</replaceable></option></term>
313
<xi:include href="mandos-options.xml" xpointer="socket"/>
318
<term><option>--foreground</option></term>
320
<xi:include href="mandos-options.xml"
321
xpointer="foreground"/>
238
328
<refsect1 id="overview">
239
329
<title>OVERVIEW</title>
240
330
<xi:include href="overview.xml"/>
242
332
This program is the server part. It is a normal server program
243
333
and will run in a normal system environment, not in an initial
244
RAM disk environment.
334
<acronym>RAM</acronym> disk environment.
248
338
<refsect1 id="protocol">
249
339
<title>NETWORK PROTOCOL</title>
303
393
</tbody></tgroup></table>
306
396
<refsect1 id="checking">
307
397
<title>CHECKING</title>
309
399
The server will, by default, continually check that the clients
310
400
are still up. If a client has not been confirmed as being up
311
401
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>
402
longer eligible to receive the encrypted password. (Manual
403
intervention is required to re-enable a client.) The timeout,
404
extended timeout, checker program, and interval between checks
405
can be configured both globally and per client; see
406
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
407
<manvolnum>5</manvolnum></citerefentry>.
411
<refsect1 id="approval">
412
<title>APPROVAL</title>
414
The server can be configured to require manual approval for a
415
client before it is sent its secret. The delay to wait for such
416
approval and the default action (approve or deny) can be
417
configured both globally and per client; see <citerefentry>
315
418
<refentrytitle>mandos-clients.conf</refentrytitle>
316
<manvolnum>5</manvolnum></citerefentry>.
419
<manvolnum>5</manvolnum></citerefentry>. By default all clients
420
will be approved immediately without delay.
423
This can be used to deny a client its secret if not manually
424
approved within a specified time. It can also be used to make
425
the server delay before giving a client its secret, allowing
426
optional manual denying of this specific client.
320
431
<refsect1 id="logging">
321
432
<title>LOGGING</title>
323
434
The server will send log message with various severity levels to
324
<filename>/dev/log</filename>. With the
435
<filename class="devicefile">/dev/log</filename>. With the
325
436
<option>--debug</option> option, it will log even more messages,
326
437
and also show them on the console.
441
<refsect1 id="persistent_state">
442
<title>PERSISTENT STATE</title>
444
Client settings, initially read from
445
<filename>clients.conf</filename>, are persistent across
446
restarts, and run-time changes will override settings in
447
<filename>clients.conf</filename>. However, if a setting is
448
<emphasis>changed</emphasis> (or a client added, or removed) in
449
<filename>clients.conf</filename>, this will take precedence.
453
<refsect1 id="dbus_interface">
454
<title>D-BUS INTERFACE</title>
456
The server will by default provide a D-Bus system bus interface.
457
This interface will only be accessible by the root user or a
458
Mandos-specific user, if such a user exists. For documentation
459
of the D-Bus API, see the file <filename>DBUS-API</filename>.
330
463
<refsect1 id="exit_status">
331
464
<title>EXIT STATUS</title>
513
647
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
650
For more details on client-side security, see
533
<citerefentry><refentrytitle>password-request</refentrytitle>
651
<citerefentry><refentrytitle>mandos-client</refentrytitle>
534
652
<manvolnum>8mandos</manvolnum></citerefentry>.
539
657
<refsect1 id="see_also">
540
658
<title>SEE ALSO</title>
543
<refentrytitle>mandos-clients.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>mandos.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>
660
<citerefentry><refentrytitle>intro</refentrytitle>
661
<manvolnum>8mandos</manvolnum></citerefentry>,
662
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
663
<manvolnum>5</manvolnum></citerefentry>,
664
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
665
<manvolnum>5</manvolnum></citerefentry>,
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
667
<manvolnum>8mandos</manvolnum></citerefentry>,
668
<citerefentry><refentrytitle>sh</refentrytitle>
669
<manvolnum>1</manvolnum></citerefentry>