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 "2008-08-30">
5
<!ENTITY TIMESTAMP "2011-11-26">
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
38
<holder>Teddy Hogeborn</holder>
35
39
<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/"/>.
41
<xi:include href="legalnotice.xml"/>
63
45
<refentrytitle>&COMMANDNAME;</refentrytitle>
64
46
<manvolnum>8</manvolnum>
70
52
Gives encrypted passwords to authenticated Mandos clients
76
58
<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>
60
<arg choice="plain"><option>--interface
61
<replaceable>NAME</replaceable></option></arg>
62
<arg choice="plain"><option>-i
63
<replaceable>NAME</replaceable></option></arg>
67
<arg choice="plain"><option>--address
68
<replaceable>ADDRESS</replaceable></option></arg>
69
<arg choice="plain"><option>-a
70
<replaceable>ADDRESS</replaceable></option></arg>
74
<arg choice="plain"><option>--port
75
<replaceable>PORT</replaceable></option></arg>
76
<arg choice="plain"><option>-p
77
<replaceable>PORT</replaceable></option></arg>
80
<arg><option>--priority
81
<replaceable>PRIORITY</replaceable></option></arg>
83
<arg><option>--servicename
84
<replaceable>NAME</replaceable></option></arg>
86
<arg><option>--configdir
87
<replaceable>DIRECTORY</replaceable></option></arg>
89
<arg><option>--debug</option></arg>
91
<arg><option>--debuglevel
92
<replaceable>LEVEL</replaceable></option></arg>
94
<arg><option>--no-dbus</option></arg>
96
<arg><option>--no-ipv6</option></arg>
98
<arg><option>--no-restore</option></arg>
100
<arg><option>--statedir
101
<replaceable>DIRECTORY</replaceable></option></arg>
96
104
<command>&COMMANDNAME;</command>
97
105
<group choice="req">
98
<arg choice="plain">-h</arg>
99
<arg choice="plain">--help</arg>
106
<arg choice="plain"><option>--help</option></arg>
107
<arg choice="plain"><option>-h</option></arg>
103
111
<command>&COMMANDNAME;</command>
104
<arg choice="plain">--version</arg>
112
<arg choice="plain"><option>--version</option></arg>
107
115
<command>&COMMANDNAME;</command>
108
<arg choice="plain">--check</arg>
116
<arg choice="plain"><option>--check</option></arg>
110
118
</refsynopsisdiv>
112
120
<refsect1 id="description">
113
121
<title>DESCRIPTION</title>
115
123
<command>&COMMANDNAME;</command> is a server daemon which
116
124
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.
125
client host computers. For an introduction, see
126
<citerefentry><refentrytitle>intro</refentrytitle>
127
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
128
uses Zeroconf to announce itself on the local network, and uses
129
TLS to communicate securely with and to authenticate the
130
clients. The Mandos server uses IPv6 to allow Mandos clients to
131
use IPv6 link-local addresses, since the clients will probably
132
not have any other addresses configured (see <xref
133
linkend="overview"/>). Any authenticated client is then given
134
the stored pre-encrypted password for that specific client.
129
138
<refsect1 id="purpose">
130
139
<title>PURPOSE</title>
133
141
The purpose of this is to enable <emphasis>remote and unattended
134
142
rebooting</emphasis> of client host computer with an
135
143
<emphasis>encrypted root file system</emphasis>. See <xref
136
144
linkend="overview"/> for details.
141
148
<refsect1 id="options">
142
149
<title>OPTIONS</title>
152
<term><option>--help</option></term>
146
153
<term><option>-h</option></term>
147
<term><option>--help</option></term>
150
156
Show a help message and exit
162
<term><option>--interface</option>
163
<replaceable>NAME</replaceable></term>
156
164
<term><option>-i</option>
157
165
<replaceable>NAME</replaceable></term>
158
<term><option>--interface</option>
159
<replaceable>NAME</replaceable></term>
161
167
<xi:include href="mandos-options.xml" xpointer="interface"/>
166
<term><literal>-a</literal>, <literal>--address <replaceable>
167
ADDRESS</replaceable></literal></term>
172
<term><option>--address
173
<replaceable>ADDRESS</replaceable></option></term>
175
<replaceable>ADDRESS</replaceable></option></term>
169
177
<xi:include href="mandos-options.xml" xpointer="address"/>
174
<term><literal>-p</literal>, <literal>--port <replaceable>
175
PORT</replaceable></literal></term>
183
<replaceable>PORT</replaceable></option></term>
185
<replaceable>PORT</replaceable></option></term>
177
187
<xi:include href="mandos-options.xml" xpointer="port"/>
182
<term><literal>--check</literal></term>
192
<term><option>--check</option></term>
185
195
Run the server’s self-tests. This includes any unit
192
<term><literal>--debug</literal></term>
202
<term><option>--debug</option></term>
194
204
<xi:include href="mandos-options.xml" xpointer="debug"/>
199
<term><literal>--priority <replaceable>
200
PRIORITY</replaceable></literal></term>
209
<term><option>--debuglevel
210
<replaceable>LEVEL</replaceable></option></term>
213
Set the debugging log level.
214
<replaceable>LEVEL</replaceable> is a string, one of
215
<quote><literal>CRITICAL</literal></quote>,
216
<quote><literal>ERROR</literal></quote>,
217
<quote><literal>WARNING</literal></quote>,
218
<quote><literal>INFO</literal></quote>, or
219
<quote><literal>DEBUG</literal></quote>, in order of
220
increasing verbosity. The default level is
221
<quote><literal>WARNING</literal></quote>.
227
<term><option>--priority <replaceable>
228
PRIORITY</replaceable></option></term>
202
230
<xi:include href="mandos-options.xml" xpointer="priority"/>
207
<term><literal>--servicename <replaceable>NAME</replaceable>
235
<term><option>--servicename
236
<replaceable>NAME</replaceable></option></term>
210
238
<xi:include href="mandos-options.xml"
211
239
xpointer="servicename"/>
216
<term><literal>--configdir <replaceable>DIR</replaceable>
244
<term><option>--configdir
245
<replaceable>DIRECTORY</replaceable></option></term>
220
248
Directory to search for configuration files. Default is
231
<term><literal>--version</literal></term>
259
<term><option>--version</option></term>
234
262
Prints the program version and exit.
268
<term><option>--no-dbus</option></term>
270
<xi:include href="mandos-options.xml" xpointer="dbus"/>
272
See also <xref linkend="dbus_interface"/>.
278
<term><option>--no-ipv6</option></term>
280
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
285
<term><option>--no-restore</option></term>
287
<xi:include href="mandos-options.xml" xpointer="restore"/>
292
<term><option>--statedir
293
<replaceable>DIRECTORY</replaceable></option></term>
295
<xi:include href="mandos-options.xml" xpointer="statedir"/>
241
301
<refsect1 id="overview">
242
302
<title>OVERVIEW</title>
243
303
<xi:include href="overview.xml"/>
245
305
This program is the server part. It is a normal server program
246
306
and will run in a normal system environment, not in an initial
247
RAM disk environment.
307
<acronym>RAM</acronym> disk environment.
251
311
<refsect1 id="protocol">
252
312
<title>NETWORK PROTOCOL</title>
306
366
</tbody></tgroup></table>
309
369
<refsect1 id="checking">
310
370
<title>CHECKING</title>
312
372
The server will, by default, continually check that the clients
313
373
are still up. If a client has not been confirmed as being up
314
374
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>
375
longer eligible to receive the encrypted password. (Manual
376
intervention is required to re-enable a client.) The timeout,
377
extended timeout, checker program, and interval between checks
378
can be configured both globally and per client; see
379
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
380
<manvolnum>5</manvolnum></citerefentry>. A client successfully
381
receiving its password will also be treated as a successful
386
<refsect1 id="approval">
387
<title>APPROVAL</title>
389
The server can be configured to require manual approval for a
390
client before it is sent its secret. The delay to wait for such
391
approval and the default action (approve or deny) can be
392
configured both globally and per client; see <citerefentry>
318
393
<refentrytitle>mandos-clients.conf</refentrytitle>
319
<manvolnum>5</manvolnum></citerefentry>.
394
<manvolnum>5</manvolnum></citerefentry>. By default all clients
395
will be approved immediately without delay.
398
This can be used to deny a client its secret if not manually
399
approved within a specified time. It can also be used to make
400
the server delay before giving a client its secret, allowing
401
optional manual denying of this specific client.
323
406
<refsect1 id="logging">
324
407
<title>LOGGING</title>
326
409
The server will send log message with various severity levels to
327
<filename>/dev/log</filename>. With the
410
<filename class="devicefile">/dev/log</filename>. With the
328
411
<option>--debug</option> option, it will log even more messages,
329
412
and also show them on the console.
416
<refsect1 id="dbus_interface">
417
<title>D-BUS INTERFACE</title>
419
The server will by default provide a D-Bus system bus interface.
420
This interface will only be accessible by the root user or a
421
Mandos-specific user, if such a user exists. For documentation
422
of the D-Bus API, see the file <filename>DBUS-API</filename>.
333
426
<refsect1 id="exit_status">
334
427
<title>EXIT STATUS</title>
516
613
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
535
616
For more details on client-side security, see
536
<citerefentry><refentrytitle>password-request</refentrytitle>
617
<citerefentry><refentrytitle>mandos-client</refentrytitle>
537
618
<manvolnum>8mandos</manvolnum></citerefentry>.
542
623
<refsect1 id="see_also">
543
624
<title>SEE ALSO</title>
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>
626
<citerefentry><refentrytitle>intro</refentrytitle>
627
<manvolnum>8mandos</manvolnum></citerefentry>,
628
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
629
<manvolnum>5</manvolnum></citerefentry>,
630
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
631
<manvolnum>5</manvolnum></citerefentry>,
632
<citerefentry><refentrytitle>mandos-client</refentrytitle>
633
<manvolnum>8mandos</manvolnum></citerefentry>,
634
<citerefentry><refentrytitle>sh</refentrytitle>
635
<manvolnum>1</manvolnum></citerefentry>