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 "2016-03-05">
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>
43
34
<holder>Teddy Hogeborn</holder>
44
35
<holder>Björn Påhlsson</holder>
46
<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/"/>.
50
63
<refentrytitle>&COMMANDNAME;</refentrytitle>
51
64
<manvolnum>8</manvolnum>
55
68
<refname><command>&COMMANDNAME;</command></refname>
57
Gives encrypted passwords to authenticated Mandos clients
70
Sends encrypted passwords to authenticated Mandos clients
63
76
<command>&COMMANDNAME;</command>
65
<arg choice="plain"><option>--interface
66
<replaceable>NAME</replaceable></option></arg>
67
<arg choice="plain"><option>-i
68
<replaceable>NAME</replaceable></option></arg>
72
<arg choice="plain"><option>--address
73
<replaceable>ADDRESS</replaceable></option></arg>
74
<arg choice="plain"><option>-a
75
<replaceable>ADDRESS</replaceable></option></arg>
79
<arg choice="plain"><option>--port
80
<replaceable>PORT</replaceable></option></arg>
81
<arg choice="plain"><option>-p
82
<replaceable>PORT</replaceable></option></arg>
85
<arg><option>--priority
86
<replaceable>PRIORITY</replaceable></option></arg>
88
<arg><option>--servicename
89
<replaceable>NAME</replaceable></option></arg>
91
<arg><option>--configdir
92
<replaceable>DIRECTORY</replaceable></option></arg>
94
<arg><option>--debug</option></arg>
96
<arg><option>--debuglevel
97
<replaceable>LEVEL</replaceable></option></arg>
99
<arg><option>--no-dbus</option></arg>
101
<arg><option>--no-ipv6</option></arg>
103
<arg><option>--no-restore</option></arg>
105
<arg><option>--statedir
106
<replaceable>DIRECTORY</replaceable></option></arg>
108
<arg><option>--socket
109
<replaceable>FD</replaceable></option></arg>
111
<arg><option>--foreground</option></arg>
113
<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>
116
96
<command>&COMMANDNAME;</command>
117
97
<group choice="req">
118
<arg choice="plain"><option>--help</option></arg>
119
<arg choice="plain"><option>-h</option></arg>
98
<arg choice="plain">-h</arg>
99
<arg choice="plain">--help</arg>
123
103
<command>&COMMANDNAME;</command>
124
<arg choice="plain"><option>--version</option></arg>
104
<arg choice="plain">--version</arg>
127
107
<command>&COMMANDNAME;</command>
128
<arg choice="plain"><option>--check</option></arg>
108
<arg choice="plain">--check</arg>
130
110
</refsynopsisdiv>
132
112
<refsect1 id="description">
133
113
<title>DESCRIPTION</title>
135
115
<command>&COMMANDNAME;</command> is a server daemon which
136
116
handles incoming request for passwords for a pre-defined list of
137
client host computers. For an introduction, see
138
<citerefentry><refentrytitle>intro</refentrytitle>
139
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
140
uses Zeroconf to announce itself on the local network, and uses
141
TLS to communicate securely with and to authenticate the
142
clients. The Mandos server uses IPv6 to allow Mandos clients to
143
use IPv6 link-local addresses, since the clients will probably
144
not have any other addresses configured (see <xref
145
linkend="overview"/>). Any authenticated client is then given
146
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.
150
129
<refsect1 id="purpose">
151
130
<title>PURPOSE</title>
153
133
The purpose of this is to enable <emphasis>remote and unattended
154
134
rebooting</emphasis> of client host computer with an
155
135
<emphasis>encrypted root file system</emphasis>. See <xref
156
136
linkend="overview"/> for details.
160
141
<refsect1 id="options">
161
142
<title>OPTIONS</title>
146
<term><option>-h</option></term>
164
147
<term><option>--help</option></term>
165
<term><option>-h</option></term>
168
150
Show a help message and exit
156
<term><option>-i</option>
157
<replaceable>NAME</replaceable></term>
174
158
<term><option>--interface</option>
175
159
<replaceable>NAME</replaceable></term>
176
<term><option>-i</option>
177
<replaceable>NAME</replaceable></term>
179
161
<xi:include href="mandos-options.xml" xpointer="interface"/>
184
<term><option>--address
185
<replaceable>ADDRESS</replaceable></option></term>
187
<replaceable>ADDRESS</replaceable></option></term>
166
<term><literal>-a</literal>, <literal>--address <replaceable>
167
ADDRESS</replaceable></literal></term>
189
169
<xi:include href="mandos-options.xml" xpointer="address"/>
195
<replaceable>PORT</replaceable></option></term>
197
<replaceable>PORT</replaceable></option></term>
174
<term><literal>-p</literal>, <literal>--port <replaceable>
175
PORT</replaceable></literal></term>
199
177
<xi:include href="mandos-options.xml" xpointer="port"/>
204
<term><option>--check</option></term>
182
<term><literal>--check</literal></term>
207
185
Run the server’s self-tests. This includes any unit
214
<term><option>--debug</option></term>
192
<term><literal>--debug</literal></term>
216
194
<xi:include href="mandos-options.xml" xpointer="debug"/>
221
<term><option>--debuglevel
222
<replaceable>LEVEL</replaceable></option></term>
225
Set the debugging log level.
226
<replaceable>LEVEL</replaceable> is a string, one of
227
<quote><literal>CRITICAL</literal></quote>,
228
<quote><literal>ERROR</literal></quote>,
229
<quote><literal>WARNING</literal></quote>,
230
<quote><literal>INFO</literal></quote>, or
231
<quote><literal>DEBUG</literal></quote>, in order of
232
increasing verbosity. The default level is
233
<quote><literal>WARNING</literal></quote>.
239
<term><option>--priority <replaceable>
240
PRIORITY</replaceable></option></term>
199
<term><literal>--priority <replaceable>
200
PRIORITY</replaceable></literal></term>
242
202
<xi:include href="mandos-options.xml" xpointer="priority"/>
247
<term><option>--servicename
248
<replaceable>NAME</replaceable></option></term>
207
<term><literal>--servicename <replaceable>NAME</replaceable>
250
210
<xi:include href="mandos-options.xml"
251
211
xpointer="servicename"/>
256
<term><option>--configdir
257
<replaceable>DIRECTORY</replaceable></option></term>
216
<term><literal>--configdir <replaceable>DIR</replaceable>
260
220
Directory to search for configuration files. Default is
271
<term><option>--version</option></term>
231
<term><literal>--version</literal></term>
274
234
Prints the program version and exit.
280
<term><option>--no-dbus</option></term>
282
<xi:include href="mandos-options.xml" xpointer="dbus"/>
284
See also <xref linkend="dbus_interface"/>.
290
<term><option>--no-ipv6</option></term>
292
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
297
<term><option>--no-restore</option></term>
299
<xi:include href="mandos-options.xml" xpointer="restore"/>
301
See also <xref linkend="persistent_state"/>.
307
<term><option>--statedir
308
<replaceable>DIRECTORY</replaceable></option></term>
310
<xi:include href="mandos-options.xml" xpointer="statedir"/>
315
<term><option>--socket
316
<replaceable>FD</replaceable></option></term>
318
<xi:include href="mandos-options.xml" xpointer="socket"/>
323
<term><option>--foreground</option></term>
325
<xi:include href="mandos-options.xml"
326
xpointer="foreground"/>
331
<term><option>--no-zeroconf</option></term>
333
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
340
241
<refsect1 id="overview">
341
242
<title>OVERVIEW</title>
342
243
<xi:include href="overview.xml"/>
344
245
This program is the server part. It is a normal server program
345
246
and will run in a normal system environment, not in an initial
346
<acronym>RAM</acronym> disk environment.
247
RAM disk environment.
350
251
<refsect1 id="protocol">
351
252
<title>NETWORK PROTOCOL</title>
405
306
</tbody></tgroup></table>
408
309
<refsect1 id="checking">
409
310
<title>CHECKING</title>
411
312
The server will, by default, continually check that the clients
412
313
are still up. If a client has not been confirmed as being up
413
314
for some time, the client is assumed to be compromised and is no
414
longer eligible to receive the encrypted password. (Manual
415
intervention is required to re-enable a client.) The timeout,
416
extended timeout, checker program, and interval between checks
417
can be configured both globally and per client; see
418
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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>
318
<refentrytitle>mandos-clients.conf</refentrytitle>
419
319
<manvolnum>5</manvolnum></citerefentry>.
423
<refsect1 id="approval">
424
<title>APPROVAL</title>
426
The server can be configured to require manual approval for a
427
client before it is sent its secret. The delay to wait for such
428
approval and the default action (approve or deny) can be
429
configured both globally and per client; see <citerefentry>
430
<refentrytitle>mandos-clients.conf</refentrytitle>
431
<manvolnum>5</manvolnum></citerefentry>. By default all clients
432
will be approved immediately without delay.
435
This can be used to deny a client its secret if not manually
436
approved within a specified time. It can also be used to make
437
the server delay before giving a client its secret, allowing
438
optional manual denying of this specific client.
443
323
<refsect1 id="logging">
444
324
<title>LOGGING</title>
446
326
The server will send log message with various severity levels to
447
<filename class="devicefile">/dev/log</filename>. With the
327
<filename>/dev/log</filename>. With the
448
328
<option>--debug</option> option, it will log even more messages,
449
329
and also show them on the console.
453
<refsect1 id="persistent_state">
454
<title>PERSISTENT STATE</title>
456
Client settings, initially read from
457
<filename>clients.conf</filename>, are persistent across
458
restarts, and run-time changes will override settings in
459
<filename>clients.conf</filename>. However, if a setting is
460
<emphasis>changed</emphasis> (or a client added, or removed) in
461
<filename>clients.conf</filename>, this will take precedence.
465
<refsect1 id="dbus_interface">
466
<title>D-BUS INTERFACE</title>
468
The server will by default provide a D-Bus system bus interface.
469
This interface will only be accessible by the root user or a
470
Mandos-specific user, if such a user exists. For documentation
471
of the D-Bus API, see the file <filename>DBUS-API</filename>.
475
333
<refsect1 id="exit_status">
476
334
<title>EXIT STATUS</title>
661
516
compromised if they are gone for too long.
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
664
535
For more details on client-side security, see
665
<citerefentry><refentrytitle>mandos-client</refentrytitle>
536
<citerefentry><refentrytitle>password-request</refentrytitle>
666
537
<manvolnum>8mandos</manvolnum></citerefentry>.
671
542
<refsect1 id="see_also">
672
543
<title>SEE ALSO</title>
674
<citerefentry><refentrytitle>intro</refentrytitle>
675
<manvolnum>8mandos</manvolnum></citerefentry>,
676
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
677
<manvolnum>5</manvolnum></citerefentry>,
678
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
679
<manvolnum>5</manvolnum></citerefentry>,
680
<citerefentry><refentrytitle>mandos-client</refentrytitle>
681
<manvolnum>8mandos</manvolnum></citerefentry>,
682
<citerefentry><refentrytitle>sh</refentrytitle>
683
<manvolnum>1</manvolnum></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>