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 "2012-06-17">
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">IF</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">IF</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>
104
<arg><option>--socket
105
<replaceable>FD</replaceable></option></arg>
107
<arg><option>--foreground</option></arg>
94
110
<command>&COMMANDNAME;</command>
95
111
<group choice="req">
96
<arg choice="plain">-h</arg>
97
<arg choice="plain">--help</arg>
112
<arg choice="plain"><option>--help</option></arg>
113
<arg choice="plain"><option>-h</option></arg>
101
117
<command>&COMMANDNAME;</command>
102
<arg choice="plain">--version</arg>
118
<arg choice="plain"><option>--version</option></arg>
105
121
<command>&COMMANDNAME;</command>
106
<arg choice="plain">--check</arg>
122
<arg choice="plain"><option>--check</option></arg>
108
124
</refsynopsisdiv>
110
126
<refsect1 id="description">
111
127
<title>DESCRIPTION</title>
113
129
<command>&COMMANDNAME;</command> is a server daemon which
114
130
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.
131
client host computers. For an introduction, see
132
<citerefentry><refentrytitle>intro</refentrytitle>
133
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
134
uses Zeroconf to announce itself on the local network, and uses
135
TLS to communicate securely with and to authenticate the
136
clients. The Mandos server uses IPv6 to allow Mandos clients to
137
use IPv6 link-local addresses, since the clients will probably
138
not have any other addresses configured (see <xref
139
linkend="overview"/>). Any authenticated client is then given
140
the stored pre-encrypted password for that specific client.
127
144
<refsect1 id="purpose">
128
145
<title>PURPOSE</title>
131
147
The purpose of this is to enable <emphasis>remote and unattended
132
148
rebooting</emphasis> of client host computer with an
133
149
<emphasis>encrypted root file system</emphasis>. See <xref
134
150
linkend="overview"/> for details.
139
154
<refsect1 id="options">
140
155
<title>OPTIONS</title>
144
<term><literal>-h</literal>, <literal>--help</literal></term>
158
<term><option>--help</option></term>
159
<term><option>-h</option></term>
147
162
Show a help message and exit
153
<term><literal>-i</literal>, <literal>--interface <replaceable>
154
IF</replaceable></literal></term>
168
<term><option>--interface</option>
169
<replaceable>NAME</replaceable></term>
170
<term><option>-i</option>
171
<replaceable>NAME</replaceable></term>
156
173
<xi:include href="mandos-options.xml" xpointer="interface"/>
161
<term><literal>-a</literal>, <literal>--address <replaceable>
162
ADDRESS</replaceable></literal></term>
178
<term><option>--address
179
<replaceable>ADDRESS</replaceable></option></term>
181
<replaceable>ADDRESS</replaceable></option></term>
164
183
<xi:include href="mandos-options.xml" xpointer="address"/>
169
<term><literal>-p</literal>, <literal>--port <replaceable>
170
PORT</replaceable></literal></term>
189
<replaceable>PORT</replaceable></option></term>
191
<replaceable>PORT</replaceable></option></term>
172
193
<xi:include href="mandos-options.xml" xpointer="port"/>
177
<term><literal>--check</literal></term>
198
<term><option>--check</option></term>
180
201
Run the server’s self-tests. This includes any unit
187
<term><literal>--debug</literal></term>
208
<term><option>--debug</option></term>
189
210
<xi:include href="mandos-options.xml" xpointer="debug"/>
194
<term><literal>--priority <replaceable>
195
PRIORITY</replaceable></literal></term>
215
<term><option>--debuglevel
216
<replaceable>LEVEL</replaceable></option></term>
219
Set the debugging log level.
220
<replaceable>LEVEL</replaceable> is a string, one of
221
<quote><literal>CRITICAL</literal></quote>,
222
<quote><literal>ERROR</literal></quote>,
223
<quote><literal>WARNING</literal></quote>,
224
<quote><literal>INFO</literal></quote>, or
225
<quote><literal>DEBUG</literal></quote>, in order of
226
increasing verbosity. The default level is
227
<quote><literal>WARNING</literal></quote>.
233
<term><option>--priority <replaceable>
234
PRIORITY</replaceable></option></term>
197
236
<xi:include href="mandos-options.xml" xpointer="priority"/>
202
<term><literal>--servicename <replaceable>NAME</replaceable>
241
<term><option>--servicename
242
<replaceable>NAME</replaceable></option></term>
205
244
<xi:include href="mandos-options.xml"
206
245
xpointer="servicename"/>
211
<term><literal>--configdir <replaceable>DIR</replaceable>
250
<term><option>--configdir
251
<replaceable>DIRECTORY</replaceable></option></term>
215
254
Directory to search for configuration files. Default is
226
<term><literal>--version</literal></term>
265
<term><option>--version</option></term>
229
268
Prints the program version and exit.
274
<term><option>--no-dbus</option></term>
276
<xi:include href="mandos-options.xml" xpointer="dbus"/>
278
See also <xref linkend="dbus_interface"/>.
284
<term><option>--no-ipv6</option></term>
286
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
291
<term><option>--no-restore</option></term>
293
<xi:include href="mandos-options.xml" xpointer="restore"/>
295
See also <xref linkend="persistent_state"/>.
301
<term><option>--statedir
302
<replaceable>DIRECTORY</replaceable></option></term>
304
<xi:include href="mandos-options.xml" xpointer="statedir"/>
309
<term><option>--socket
310
<replaceable>FD</replaceable></option></term>
312
<xi:include href="mandos-options.xml" xpointer="socket"/>
317
<term><option>--foreground</option></term>
319
<xi:include href="mandos-options.xml"
320
xpointer="foreground"/>
236
327
<refsect1 id="overview">
237
328
<title>OVERVIEW</title>
238
329
<xi:include href="overview.xml"/>
240
331
This program is the server part. It is a normal server program
241
332
and will run in a normal system environment, not in an initial
242
RAM disk environment.
333
<acronym>RAM</acronym> disk environment.
246
337
<refsect1 id="protocol">
247
338
<title>NETWORK PROTOCOL</title>
301
392
</tbody></tgroup></table>
304
395
<refsect1 id="checking">
305
396
<title>CHECKING</title>
307
398
The server will, by default, continually check that the clients
308
399
are still up. If a client has not been confirmed as being up
309
400
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>
401
longer eligible to receive the encrypted password. (Manual
402
intervention is required to re-enable a client.) The timeout,
403
extended timeout, checker program, and interval between checks
404
can be configured both globally and per client; see
405
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
406
<manvolnum>5</manvolnum></citerefentry>.
410
<refsect1 id="approval">
411
<title>APPROVAL</title>
413
The server can be configured to require manual approval for a
414
client before it is sent its secret. The delay to wait for such
415
approval and the default action (approve or deny) can be
416
configured both globally and per client; see <citerefentry>
313
417
<refentrytitle>mandos-clients.conf</refentrytitle>
314
<manvolnum>5</manvolnum></citerefentry>.
418
<manvolnum>5</manvolnum></citerefentry>. By default all clients
419
will be approved immediately without delay.
422
This can be used to deny a client its secret if not manually
423
approved within a specified time. It can also be used to make
424
the server delay before giving a client its secret, allowing
425
optional manual denying of this specific client.
318
430
<refsect1 id="logging">
319
431
<title>LOGGING</title>
321
433
The server will send log message with various severity levels to
322
<filename>/dev/log</filename>. With the
434
<filename class="devicefile">/dev/log</filename>. With the
323
435
<option>--debug</option> option, it will log even more messages,
324
436
and also show them on the console.
440
<refsect1 id="persistent_state">
441
<title>PERSISTENT STATE</title>
443
Client settings, initially read from
444
<filename>clients.conf</filename>, are persistent across
445
restarts, and run-time changes will override settings in
446
<filename>clients.conf</filename>. However, if a setting is
447
<emphasis>changed</emphasis> (or a client added, or removed) in
448
<filename>clients.conf</filename>, this will take precedence.
452
<refsect1 id="dbus_interface">
453
<title>D-BUS INTERFACE</title>
455
The server will by default provide a D-Bus system bus interface.
456
This interface will only be accessible by the root user or a
457
Mandos-specific user, if such a user exists. For documentation
458
of the D-Bus API, see the file <filename>DBUS-API</filename>.
328
462
<refsect1 id="exit_status">
329
463
<title>EXIT STATUS</title>
511
646
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
649
For more details on client-side security, see
531
<citerefentry><refentrytitle>password-request</refentrytitle>
650
<citerefentry><refentrytitle>mandos-client</refentrytitle>
532
651
<manvolnum>8mandos</manvolnum></citerefentry>.
537
656
<refsect1 id="see_also">
538
657
<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>
659
<citerefentry><refentrytitle>intro</refentrytitle>
660
<manvolnum>8mandos</manvolnum></citerefentry>,
661
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
662
<manvolnum>5</manvolnum></citerefentry>,
663
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
664
<manvolnum>5</manvolnum></citerefentry>,
665
<citerefentry><refentrytitle>mandos-client</refentrytitle>
666
<manvolnum>8mandos</manvolnum></citerefentry>,
667
<citerefentry><refentrytitle>sh</refentrytitle>
668
<manvolnum>1</manvolnum></citerefentry>
588
<citation>RFC 4291: <citetitle>IP Version 6 Addressing
589
Architecture</citetitle>, section 2.5.6, Link-Local IPv6
590
Unicast Addresses</citation>
708
RFC 4291: <citetitle>IP Version 6 Addressing
709
Architecture</citetitle>
594
The clients use IPv6 link-local addresses, which are
595
immediately usable since a link-local addresses is
596
automatically assigned to a network interfaces when it is
714
<term>Section 2.2: <citetitle>Text Representation of
715
Addresses</citetitle></term>
716
<listitem><para/></listitem>
719
<term>Section 2.5.5.2: <citetitle>IPv4-Mapped IPv6
720
Address</citetitle></term>
721
<listitem><para/></listitem>
724
<term>Section 2.5.6, <citetitle>Link-Local IPv6 Unicast
725
Addresses</citetitle></term>
728
The clients use IPv6 link-local addresses, which are
729
immediately usable since a link-local addresses is
730
automatically assigned to a network interfaces when it
603
<citation>RFC 4346: <citetitle>The Transport Layer Security
604
(TLS) Protocol Version 1.1</citetitle></citation>
740
RFC 4346: <citetitle>The Transport Layer Security (TLS)
741
Protocol Version 1.1</citetitle>