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 "2012-06-17">
6
<!ENTITY % common SYSTEM "common.ent">
10
8
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
12
<title>Mandos Manual</title>
10
<title>&COMMANDNAME;</title>
13
11
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
14
<productname>Mandos</productname>
15
<productnumber>&version;</productnumber>
16
<date>&TIMESTAMP;</date>
12
<productname>&COMMANDNAME;</productname>
13
<productnumber>&VERSION;</productnumber>
19
16
<firstname>Björn</firstname>
20
17
<surname>Påhlsson</surname>
22
<email>belorn@recompile.se</email>
19
<email>belorn@fukt.bsnet.se</email>
26
23
<firstname>Teddy</firstname>
27
24
<surname>Hogeborn</surname>
29
<email>teddy@recompile.se</email>
26
<email>teddy@fukt.bsnet.se</email>
39
32
<holder>Teddy Hogeborn</holder>
40
33
<holder>Björn Påhlsson</holder>
42
<xi:include href="legalnotice.xml"/>
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/"/>.
46
61
<refentrytitle>&COMMANDNAME;</refentrytitle>
47
62
<manvolnum>8</manvolnum>
51
66
<refname><command>&COMMANDNAME;</command></refname>
53
Gives encrypted passwords to authenticated Mandos clients
68
Sends encrypted passwords to authenticated Mandos clients
59
74
<command>&COMMANDNAME;</command>
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>
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>
110
94
<command>&COMMANDNAME;</command>
111
95
<group choice="req">
112
<arg choice="plain"><option>--help</option></arg>
113
<arg choice="plain"><option>-h</option></arg>
96
<arg choice="plain">-h</arg>
97
<arg choice="plain">--help</arg>
117
101
<command>&COMMANDNAME;</command>
118
<arg choice="plain"><option>--version</option></arg>
102
<arg choice="plain">--version</arg>
121
105
<command>&COMMANDNAME;</command>
122
<arg choice="plain"><option>--check</option></arg>
106
<arg choice="plain">--check</arg>
124
108
</refsynopsisdiv>
126
110
<refsect1 id="description">
127
111
<title>DESCRIPTION</title>
129
113
<command>&COMMANDNAME;</command> is a server daemon which
130
114
handles incoming request for passwords for a pre-defined list of
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.
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.
144
127
<refsect1 id="purpose">
145
128
<title>PURPOSE</title>
147
131
The purpose of this is to enable <emphasis>remote and unattended
148
132
rebooting</emphasis> of client host computer with an
149
133
<emphasis>encrypted root file system</emphasis>. See <xref
150
134
linkend="overview"/> for details.
154
139
<refsect1 id="options">
155
140
<title>OPTIONS</title>
158
<term><option>--help</option></term>
159
<term><option>-h</option></term>
144
<term><literal>-h</literal>, <literal>--help</literal></term>
162
147
Show a help message and exit
168
<term><option>--interface</option>
169
<replaceable>NAME</replaceable></term>
170
<term><option>-i</option>
171
<replaceable>NAME</replaceable></term>
153
<term><literal>-i</literal>, <literal>--interface <replaceable
154
>NAME</replaceable></literal></term>
173
156
<xi:include href="mandos-options.xml" xpointer="interface"/>
178
<term><option>--address
179
<replaceable>ADDRESS</replaceable></option></term>
181
<replaceable>ADDRESS</replaceable></option></term>
161
<term><literal>-a</literal>, <literal>--address <replaceable>
162
ADDRESS</replaceable></literal></term>
183
164
<xi:include href="mandos-options.xml" xpointer="address"/>
189
<replaceable>PORT</replaceable></option></term>
191
<replaceable>PORT</replaceable></option></term>
169
<term><literal>-p</literal>, <literal>--port <replaceable>
170
PORT</replaceable></literal></term>
193
172
<xi:include href="mandos-options.xml" xpointer="port"/>
198
<term><option>--check</option></term>
177
<term><literal>--check</literal></term>
201
180
Run the server’s self-tests. This includes any unit
208
<term><option>--debug</option></term>
187
<term><literal>--debug</literal></term>
210
189
<xi:include href="mandos-options.xml" xpointer="debug"/>
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>
194
<term><literal>--priority <replaceable>
195
PRIORITY</replaceable></literal></term>
236
197
<xi:include href="mandos-options.xml" xpointer="priority"/>
241
<term><option>--servicename
242
<replaceable>NAME</replaceable></option></term>
202
<term><literal>--servicename <replaceable>NAME</replaceable>
244
205
<xi:include href="mandos-options.xml"
245
206
xpointer="servicename"/>
250
<term><option>--configdir
251
<replaceable>DIRECTORY</replaceable></option></term>
211
<term><literal>--configdir <replaceable>DIR</replaceable>
254
215
Directory to search for configuration files. Default is
265
<term><option>--version</option></term>
226
<term><literal>--version</literal></term>
268
229
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"/>
327
236
<refsect1 id="overview">
328
237
<title>OVERVIEW</title>
329
238
<xi:include href="overview.xml"/>
331
240
This program is the server part. It is a normal server program
332
241
and will run in a normal system environment, not in an initial
333
<acronym>RAM</acronym> disk environment.
242
RAM disk environment.
337
246
<refsect1 id="protocol">
338
247
<title>NETWORK PROTOCOL</title>
392
301
</tbody></tgroup></table>
395
304
<refsect1 id="checking">
396
305
<title>CHECKING</title>
398
307
The server will, by default, continually check that the clients
399
308
are still up. If a client has not been confirmed as being up
400
309
for some time, the client is assumed to be compromised and is no
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>
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>
313
<refentrytitle>mandos-clients.conf</refentrytitle>
406
314
<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>
417
<refentrytitle>mandos-clients.conf</refentrytitle>
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.
430
318
<refsect1 id="logging">
431
319
<title>LOGGING</title>
433
321
The server will send log message with various severity levels to
434
<filename class="devicefile">/dev/log</filename>. With the
322
<filename>/dev/log</filename>. With the
435
323
<option>--debug</option> option, it will log even more messages,
436
324
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>.
462
328
<refsect1 id="exit_status">
463
329
<title>EXIT STATUS</title>
646
511
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
649
530
For more details on client-side security, see
650
<citerefentry><refentrytitle>mandos-client</refentrytitle>
531
<citerefentry><refentrytitle>password-request</refentrytitle>
651
532
<manvolnum>8mandos</manvolnum></citerefentry>.
656
537
<refsect1 id="see_also">
657
538
<title>SEE ALSO</title>
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>
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>