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">
4
5
<!ENTITY COMMANDNAME "mandos">
5
<!ENTITY TIMESTAMP "2017-02-23">
6
<!ENTITY % common SYSTEM "common.ent">
6
<!ENTITY TIMESTAMP "2008-08-29">
10
9
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
12
11
<title>Mandos Manual</title>
13
12
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
14
13
<productname>Mandos</productname>
15
<productnumber>&version;</productnumber>
14
<productnumber>&VERSION;</productnumber>
16
15
<date>&TIMESTAMP;</date>
19
18
<firstname>Björn</firstname>
20
19
<surname>Påhlsson</surname>
22
<email>belorn@recompile.se</email>
21
<email>belorn@fukt.bsnet.se</email>
26
25
<firstname>Teddy</firstname>
27
26
<surname>Hogeborn</surname>
29
<email>teddy@recompile.se</email>
28
<email>teddy@fukt.bsnet.se</email>
44
34
<holder>Teddy Hogeborn</holder>
45
35
<holder>Björn Påhlsson</holder>
47
<xi:include href="legalnotice.xml"/>
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/"/>.
51
63
<refentrytitle>&COMMANDNAME;</refentrytitle>
52
64
<manvolnum>8</manvolnum>
56
68
<refname><command>&COMMANDNAME;</command></refname>
58
Gives encrypted passwords to authenticated Mandos clients
70
Sends encrypted passwords to authenticated Mandos clients
64
76
<command>&COMMANDNAME;</command>
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>
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>
117
96
<command>&COMMANDNAME;</command>
118
97
<group choice="req">
119
<arg choice="plain"><option>--help</option></arg>
120
<arg choice="plain"><option>-h</option></arg>
98
<arg choice="plain">-h</arg>
99
<arg choice="plain">--help</arg>
124
103
<command>&COMMANDNAME;</command>
125
<arg choice="plain"><option>--version</option></arg>
104
<arg choice="plain">--version</arg>
128
107
<command>&COMMANDNAME;</command>
129
<arg choice="plain"><option>--check</option></arg>
108
<arg choice="plain">--check</arg>
131
110
</refsynopsisdiv>
133
112
<refsect1 id="description">
134
113
<title>DESCRIPTION</title>
136
115
<command>&COMMANDNAME;</command> is a server daemon which
137
116
handles incoming request for passwords for a pre-defined list of
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.
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.
151
129
<refsect1 id="purpose">
152
130
<title>PURPOSE</title>
154
133
The purpose of this is to enable <emphasis>remote and unattended
155
134
rebooting</emphasis> of client host computer with an
156
135
<emphasis>encrypted root file system</emphasis>. See <xref
157
136
linkend="overview"/> for details.
161
141
<refsect1 id="options">
162
142
<title>OPTIONS</title>
165
<term><option>--help</option></term>
166
<term><option>-h</option></term>
146
<term><literal>-h</literal>, <literal>--help</literal></term>
169
149
Show a help message and exit
175
<term><option>--interface</option>
176
<replaceable>NAME</replaceable></term>
177
<term><option>-i</option>
178
<replaceable>NAME</replaceable></term>
155
<term><literal>-i</literal>, <literal>--interface <replaceable
156
>NAME</replaceable></literal></term>
180
158
<xi:include href="mandos-options.xml" xpointer="interface"/>
185
<term><option>--address
186
<replaceable>ADDRESS</replaceable></option></term>
188
<replaceable>ADDRESS</replaceable></option></term>
163
<term><literal>-a</literal>, <literal>--address <replaceable>
164
ADDRESS</replaceable></literal></term>
190
166
<xi:include href="mandos-options.xml" xpointer="address"/>
196
<replaceable>PORT</replaceable></option></term>
198
<replaceable>PORT</replaceable></option></term>
171
<term><literal>-p</literal>, <literal>--port <replaceable>
172
PORT</replaceable></literal></term>
200
174
<xi:include href="mandos-options.xml" xpointer="port"/>
205
<term><option>--check</option></term>
179
<term><literal>--check</literal></term>
208
182
Run the server’s self-tests. This includes any unit
215
<term><option>--debug</option></term>
189
<term><literal>--debug</literal></term>
217
191
<xi:include href="mandos-options.xml" xpointer="debug"/>
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>
196
<term><literal>--priority <replaceable>
197
PRIORITY</replaceable></literal></term>
243
199
<xi:include href="mandos-options.xml" xpointer="priority"/>
248
<term><option>--servicename
249
<replaceable>NAME</replaceable></option></term>
204
<term><literal>--servicename <replaceable>NAME</replaceable>
251
207
<xi:include href="mandos-options.xml"
252
208
xpointer="servicename"/>
257
<term><option>--configdir
258
<replaceable>DIRECTORY</replaceable></option></term>
213
<term><literal>--configdir <replaceable>DIR</replaceable>
261
217
Directory to search for configuration files. Default is
272
<term><option>--version</option></term>
228
<term><literal>--version</literal></term>
275
231
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"/>
341
238
<refsect1 id="overview">
342
239
<title>OVERVIEW</title>
343
240
<xi:include href="overview.xml"/>
345
242
This program is the server part. It is a normal server program
346
243
and will run in a normal system environment, not in an initial
347
<acronym>RAM</acronym> disk environment.
244
RAM disk environment.
351
248
<refsect1 id="protocol">
352
249
<title>NETWORK PROTOCOL</title>
406
303
</tbody></tgroup></table>
409
306
<refsect1 id="checking">
410
307
<title>CHECKING</title>
412
309
The server will, by default, continually check that the clients
413
310
are still up. If a client has not been confirmed as being up
414
311
for some time, the client is assumed to be compromised and is no
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>
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>
315
<refentrytitle>mandos-clients.conf</refentrytitle>
420
316
<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>
431
<refentrytitle>mandos-clients.conf</refentrytitle>
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.
444
320
<refsect1 id="logging">
445
321
<title>LOGGING</title>
447
323
The server will send log message with various severity levels to
448
<filename class="devicefile">/dev/log</filename>. With the
324
<filename>/dev/log</filename>. With the
449
325
<option>--debug</option> option, it will log even more messages,
450
326
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>.
476
330
<refsect1 id="exit_status">
477
331
<title>EXIT STATUS</title>
662
513
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
665
532
For more details on client-side security, see
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
533
<citerefentry><refentrytitle>password-request</refentrytitle>
667
534
<manvolnum>8mandos</manvolnum></citerefentry>.
672
539
<refsect1 id="see_also">
673
540
<title>SEE ALSO</title>
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>
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>