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">
5
<!ENTITY TIMESTAMP "2012-01-01">
6
<!ENTITY % common SYSTEM "common.ent">
8
10
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
10
<title>&COMMANDNAME;</title>
12
<title>Mandos Manual</title>
11
13
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
12
<productname>&COMMANDNAME;</productname>
13
<productnumber>&VERSION;</productnumber>
14
<productname>Mandos</productname>
15
<productnumber>&version;</productnumber>
16
<date>&TIMESTAMP;</date>
16
19
<firstname>Björn</firstname>
17
20
<surname>Påhlsson</surname>
19
<email>belorn@fukt.bsnet.se</email>
22
<email>belorn@recompile.se</email>
23
26
<firstname>Teddy</firstname>
24
27
<surname>Hogeborn</surname>
26
<email>teddy@fukt.bsnet.se</email>
29
<email>teddy@recompile.se</email>
32
39
<holder>Teddy Hogeborn</holder>
33
40
<holder>Björn Påhlsson</holder>
37
This manual page is free software: you can redistribute it
38
and/or modify it under the terms of the GNU General Public
39
License as published by the Free Software Foundation,
40
either version 3 of the License, or (at your option) any
45
This manual page is distributed in the hope that it will
46
be useful, but WITHOUT ANY WARRANTY; without even the
47
implied warranty of MERCHANTABILITY or FITNESS FOR A
48
PARTICULAR PURPOSE. See the GNU General Public License
53
You should have received a copy of the GNU General Public
54
License along with this program; If not, see
55
<ulink url="http://www.gnu.org/licenses/"/>.
42
<xi:include href="legalnotice.xml"/>
61
46
<refentrytitle>&COMMANDNAME;</refentrytitle>
62
47
<manvolnum>8</manvolnum>
66
51
<refname><command>&COMMANDNAME;</command></refname>
68
Sends encrypted passwords to authenticated Mandos clients
53
Gives encrypted passwords to authenticated Mandos clients
74
59
<command>&COMMANDNAME;</command>
75
<arg>--interface<arg choice="plain">NAME</arg></arg>
76
<arg>--address<arg choice="plain">ADDRESS</arg></arg>
77
<arg>--port<arg choice="plain">PORT</arg></arg>
78
<arg>--priority<arg choice="plain">PRIORITY</arg></arg>
79
<arg>--servicename<arg choice="plain">NAME</arg></arg>
80
<arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
84
<command>&COMMANDNAME;</command>
85
<arg>-i<arg choice="plain">NAME</arg></arg>
86
<arg>-a<arg choice="plain">ADDRESS</arg></arg>
87
<arg>-p<arg choice="plain">PORT</arg></arg>
88
<arg>--priority<arg choice="plain">PRIORITY</arg></arg>
89
<arg>--servicename<arg choice="plain">NAME</arg></arg>
90
<arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
61
<arg choice="plain"><option>--interface
62
<replaceable>NAME</replaceable></option></arg>
63
<arg choice="plain"><option>-i
64
<replaceable>NAME</replaceable></option></arg>
68
<arg choice="plain"><option>--address
69
<replaceable>ADDRESS</replaceable></option></arg>
70
<arg choice="plain"><option>-a
71
<replaceable>ADDRESS</replaceable></option></arg>
75
<arg choice="plain"><option>--port
76
<replaceable>PORT</replaceable></option></arg>
77
<arg choice="plain"><option>-p
78
<replaceable>PORT</replaceable></option></arg>
81
<arg><option>--priority
82
<replaceable>PRIORITY</replaceable></option></arg>
84
<arg><option>--servicename
85
<replaceable>NAME</replaceable></option></arg>
87
<arg><option>--configdir
88
<replaceable>DIRECTORY</replaceable></option></arg>
90
<arg><option>--debug</option></arg>
92
<arg><option>--debuglevel
93
<replaceable>LEVEL</replaceable></option></arg>
95
<arg><option>--no-dbus</option></arg>
97
<arg><option>--no-ipv6</option></arg>
99
<arg><option>--no-restore</option></arg>
101
<arg><option>--statedir
102
<replaceable>DIRECTORY</replaceable></option></arg>
94
105
<command>&COMMANDNAME;</command>
95
106
<group choice="req">
96
<arg choice="plain">-h</arg>
97
<arg choice="plain">--help</arg>
107
<arg choice="plain"><option>--help</option></arg>
108
<arg choice="plain"><option>-h</option></arg>
101
112
<command>&COMMANDNAME;</command>
102
<arg choice="plain">--version</arg>
113
<arg choice="plain"><option>--version</option></arg>
105
116
<command>&COMMANDNAME;</command>
106
<arg choice="plain">--check</arg>
117
<arg choice="plain"><option>--check</option></arg>
108
119
</refsynopsisdiv>
110
121
<refsect1 id="description">
111
122
<title>DESCRIPTION</title>
113
124
<command>&COMMANDNAME;</command> is a server daemon which
114
125
handles incoming request for passwords for a pre-defined list of
115
client host computers. The Mandos server uses Zeroconf to
116
announce itself on the local network, and uses TLS to
117
communicate securely with and to authenticate the clients. The
118
Mandos server uses IPv6 to allow Mandos clients to use IPv6
119
link-local addresses, since the clients will probably not have
120
any other addresses configured (see <xref linkend="overview"/>).
121
Any authenticated client is then given the stored pre-encrypted
122
password for that specific client.
126
client host computers. For an introduction, see
127
<citerefentry><refentrytitle>intro</refentrytitle>
128
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
129
uses Zeroconf to announce itself on the local network, and uses
130
TLS to communicate securely with and to authenticate the
131
clients. The Mandos server uses IPv6 to allow Mandos clients to
132
use IPv6 link-local addresses, since the clients will probably
133
not have any other addresses configured (see <xref
134
linkend="overview"/>). Any authenticated client is then given
135
the stored pre-encrypted password for that specific client.
127
139
<refsect1 id="purpose">
128
140
<title>PURPOSE</title>
131
142
The purpose of this is to enable <emphasis>remote and unattended
132
143
rebooting</emphasis> of client host computer with an
133
144
<emphasis>encrypted root file system</emphasis>. See <xref
134
145
linkend="overview"/> for details.
139
149
<refsect1 id="options">
140
150
<title>OPTIONS</title>
144
<term><literal>-h</literal>, <literal>--help</literal></term>
153
<term><option>--help</option></term>
154
<term><option>-h</option></term>
147
157
Show a help message and exit
153
<term><literal>-i</literal>, <literal>--interface <replaceable
154
>NAME</replaceable></literal></term>
163
<term><option>--interface</option>
164
<replaceable>NAME</replaceable></term>
165
<term><option>-i</option>
166
<replaceable>NAME</replaceable></term>
156
168
<xi:include href="mandos-options.xml" xpointer="interface"/>
161
<term><literal>-a</literal>, <literal>--address <replaceable>
162
ADDRESS</replaceable></literal></term>
173
<term><option>--address
174
<replaceable>ADDRESS</replaceable></option></term>
176
<replaceable>ADDRESS</replaceable></option></term>
164
178
<xi:include href="mandos-options.xml" xpointer="address"/>
169
<term><literal>-p</literal>, <literal>--port <replaceable>
170
PORT</replaceable></literal></term>
184
<replaceable>PORT</replaceable></option></term>
186
<replaceable>PORT</replaceable></option></term>
172
188
<xi:include href="mandos-options.xml" xpointer="port"/>
177
<term><literal>--check</literal></term>
193
<term><option>--check</option></term>
180
196
Run the server’s self-tests. This includes any unit
187
<term><literal>--debug</literal></term>
203
<term><option>--debug</option></term>
189
205
<xi:include href="mandos-options.xml" xpointer="debug"/>
194
<term><literal>--priority <replaceable>
195
PRIORITY</replaceable></literal></term>
210
<term><option>--debuglevel
211
<replaceable>LEVEL</replaceable></option></term>
214
Set the debugging log level.
215
<replaceable>LEVEL</replaceable> is a string, one of
216
<quote><literal>CRITICAL</literal></quote>,
217
<quote><literal>ERROR</literal></quote>,
218
<quote><literal>WARNING</literal></quote>,
219
<quote><literal>INFO</literal></quote>, or
220
<quote><literal>DEBUG</literal></quote>, in order of
221
increasing verbosity. The default level is
222
<quote><literal>WARNING</literal></quote>.
228
<term><option>--priority <replaceable>
229
PRIORITY</replaceable></option></term>
197
231
<xi:include href="mandos-options.xml" xpointer="priority"/>
202
<term><literal>--servicename <replaceable>NAME</replaceable>
236
<term><option>--servicename
237
<replaceable>NAME</replaceable></option></term>
205
239
<xi:include href="mandos-options.xml"
206
240
xpointer="servicename"/>
211
<term><literal>--configdir <replaceable>DIR</replaceable>
245
<term><option>--configdir
246
<replaceable>DIRECTORY</replaceable></option></term>
215
249
Directory to search for configuration files. Default is
226
<term><literal>--version</literal></term>
260
<term><option>--version</option></term>
229
263
Prints the program version and exit.
269
<term><option>--no-dbus</option></term>
271
<xi:include href="mandos-options.xml" xpointer="dbus"/>
273
See also <xref linkend="dbus_interface"/>.
279
<term><option>--no-ipv6</option></term>
281
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
286
<term><option>--no-restore</option></term>
288
<xi:include href="mandos-options.xml" xpointer="restore"/>
290
See also <xref linkend="persistent_state"/>.
296
<term><option>--statedir
297
<replaceable>DIRECTORY</replaceable></option></term>
299
<xi:include href="mandos-options.xml" xpointer="statedir"/>
236
305
<refsect1 id="overview">
237
306
<title>OVERVIEW</title>
238
307
<xi:include href="overview.xml"/>
240
309
This program is the server part. It is a normal server program
241
310
and will run in a normal system environment, not in an initial
242
RAM disk environment.
311
<acronym>RAM</acronym> disk environment.
246
315
<refsect1 id="protocol">
247
316
<title>NETWORK PROTOCOL</title>
301
370
</tbody></tgroup></table>
304
373
<refsect1 id="checking">
305
374
<title>CHECKING</title>
307
376
The server will, by default, continually check that the clients
308
377
are still up. If a client has not been confirmed as being up
309
378
for some time, the client is assumed to be compromised and is no
310
longer eligible to receive the encrypted password. The timeout,
311
checker program, and interval between checks can be configured
312
both globally and per client; see <citerefentry>
379
longer eligible to receive the encrypted password. (Manual
380
intervention is required to re-enable a client.) The timeout,
381
extended timeout, checker program, and interval between checks
382
can be configured both globally and per client; see
383
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
384
<manvolnum>5</manvolnum></citerefentry>. A client successfully
385
receiving its password will also be treated as a successful
390
<refsect1 id="approval">
391
<title>APPROVAL</title>
393
The server can be configured to require manual approval for a
394
client before it is sent its secret. The delay to wait for such
395
approval and the default action (approve or deny) can be
396
configured both globally and per client; see <citerefentry>
313
397
<refentrytitle>mandos-clients.conf</refentrytitle>
314
<manvolnum>5</manvolnum></citerefentry>.
398
<manvolnum>5</manvolnum></citerefentry>. By default all clients
399
will be approved immediately without delay.
402
This can be used to deny a client its secret if not manually
403
approved within a specified time. It can also be used to make
404
the server delay before giving a client its secret, allowing
405
optional manual denying of this specific client.
318
410
<refsect1 id="logging">
319
411
<title>LOGGING</title>
321
413
The server will send log message with various severity levels to
322
<filename>/dev/log</filename>. With the
414
<filename class="devicefile">/dev/log</filename>. With the
323
415
<option>--debug</option> option, it will log even more messages,
324
416
and also show them on the console.
420
<refsect1 id="persistent_state">
421
<title>PERSISTENT STATE</title>
423
Client settings, initially read from
424
<filename>clients.conf</filename>, are persistent across
425
restarts, and run-time changes will override settings in
426
<filename>clients.conf</filename>. However, if a setting is
427
<emphasis>changed</emphasis> (or a client added, or removed) in
428
<filename>clients.conf</filename>, this will take precedence.
432
<refsect1 id="dbus_interface">
433
<title>D-BUS INTERFACE</title>
435
The server will by default provide a D-Bus system bus interface.
436
This interface will only be accessible by the root user or a
437
Mandos-specific user, if such a user exists. For documentation
438
of the D-Bus API, see the file <filename>DBUS-API</filename>.
328
442
<refsect1 id="exit_status">
329
443
<title>EXIT STATUS</title>
511
629
compromised if they are gone for too long.
514
If a client is compromised, its downtime should be duly noted
515
by the server which would therefore declare the client
516
invalid. But if the server was ever restarted, it would
517
re-read its client list from its configuration file and again
518
regard all clients therein as valid, and hence eligible to
519
receive their passwords. Therefore, be careful when
520
restarting servers if it is suspected that a client has, in
521
fact, been compromised by parties who may now be running a
522
fake Mandos client with the keys from the non-encrypted
523
initial RAM image of the client host. What should be done in
524
that case (if restarting the server program really is
525
necessary) is to stop the server program, edit the
526
configuration file to omit any suspect clients, and restart
530
632
For more details on client-side security, see
531
<citerefentry><refentrytitle>password-request</refentrytitle>
633
<citerefentry><refentrytitle>mandos-client</refentrytitle>
532
634
<manvolnum>8mandos</manvolnum></citerefentry>.
537
639
<refsect1 id="see_also">
538
640
<title>SEE ALSO</title>
541
<refentrytitle>mandos.conf</refentrytitle>
542
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
543
<refentrytitle>mandos-clients.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>password-request</refentrytitle>
546
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
547
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
642
<citerefentry><refentrytitle>intro</refentrytitle>
643
<manvolnum>8mandos</manvolnum></citerefentry>,
644
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
645
<manvolnum>5</manvolnum></citerefentry>,
646
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
647
<manvolnum>5</manvolnum></citerefentry>,
648
<citerefentry><refentrytitle>mandos-client</refentrytitle>
649
<manvolnum>8mandos</manvolnum></citerefentry>,
650
<citerefentry><refentrytitle>sh</refentrytitle>
651
<manvolnum>1</manvolnum></citerefentry>