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 "2016-02-28">
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
43
<holder>Teddy Hogeborn</holder>
33
44
<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/"/>.
46
<xi:include href="legalnotice.xml"/>
61
50
<refentrytitle>&COMMANDNAME;</refentrytitle>
62
51
<manvolnum>8</manvolnum>
66
55
<refname><command>&COMMANDNAME;</command></refname>
68
Sends encrypted passwords to authenticated Mandos clients
57
Gives encrypted passwords to authenticated Mandos clients
74
63
<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>
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>
94
116
<command>&COMMANDNAME;</command>
95
117
<group choice="req">
96
<arg choice="plain">-h</arg>
97
<arg choice="plain">--help</arg>
118
<arg choice="plain"><option>--help</option></arg>
119
<arg choice="plain"><option>-h</option></arg>
101
123
<command>&COMMANDNAME;</command>
102
<arg choice="plain">--version</arg>
124
<arg choice="plain"><option>--version</option></arg>
105
127
<command>&COMMANDNAME;</command>
106
<arg choice="plain">--check</arg>
128
<arg choice="plain"><option>--check</option></arg>
108
130
</refsynopsisdiv>
110
132
<refsect1 id="description">
111
133
<title>DESCRIPTION</title>
113
135
<command>&COMMANDNAME;</command> is a server daemon which
114
136
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.
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.
127
150
<refsect1 id="purpose">
128
151
<title>PURPOSE</title>
131
153
The purpose of this is to enable <emphasis>remote and unattended
132
154
rebooting</emphasis> of client host computer with an
133
155
<emphasis>encrypted root file system</emphasis>. See <xref
134
156
linkend="overview"/> for details.
139
160
<refsect1 id="options">
140
161
<title>OPTIONS</title>
144
<term><literal>-h</literal>, <literal>--help</literal></term>
164
<term><option>--help</option></term>
165
<term><option>-h</option></term>
147
168
Show a help message and exit
153
<term><literal>-i</literal>, <literal>--interface <replaceable
154
>NAME</replaceable></literal></term>
174
<term><option>--interface</option>
175
<replaceable>NAME</replaceable></term>
176
<term><option>-i</option>
177
<replaceable>NAME</replaceable></term>
156
179
<xi:include href="mandos-options.xml" xpointer="interface"/>
161
<term><literal>-a</literal>, <literal>--address <replaceable>
162
ADDRESS</replaceable></literal></term>
184
<term><option>--address
185
<replaceable>ADDRESS</replaceable></option></term>
187
<replaceable>ADDRESS</replaceable></option></term>
164
189
<xi:include href="mandos-options.xml" xpointer="address"/>
169
<term><literal>-p</literal>, <literal>--port <replaceable>
170
PORT</replaceable></literal></term>
195
<replaceable>PORT</replaceable></option></term>
197
<replaceable>PORT</replaceable></option></term>
172
199
<xi:include href="mandos-options.xml" xpointer="port"/>
177
<term><literal>--check</literal></term>
204
<term><option>--check</option></term>
180
207
Run the server’s self-tests. This includes any unit
187
<term><literal>--debug</literal></term>
214
<term><option>--debug</option></term>
189
216
<xi:include href="mandos-options.xml" xpointer="debug"/>
194
<term><literal>--priority <replaceable>
195
PRIORITY</replaceable></literal></term>
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>
197
242
<xi:include href="mandos-options.xml" xpointer="priority"/>
202
<term><literal>--servicename <replaceable>NAME</replaceable>
247
<term><option>--servicename
248
<replaceable>NAME</replaceable></option></term>
205
250
<xi:include href="mandos-options.xml"
206
251
xpointer="servicename"/>
211
<term><literal>--configdir <replaceable>DIR</replaceable>
256
<term><option>--configdir
257
<replaceable>DIRECTORY</replaceable></option></term>
215
260
Directory to search for configuration files. Default is
226
<term><literal>--version</literal></term>
271
<term><option>--version</option></term>
229
274
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"/>
236
340
<refsect1 id="overview">
237
341
<title>OVERVIEW</title>
238
342
<xi:include href="overview.xml"/>
240
344
This program is the server part. It is a normal server program
241
345
and will run in a normal system environment, not in an initial
242
RAM disk environment.
346
<acronym>RAM</acronym> disk environment.
246
350
<refsect1 id="protocol">
247
351
<title>NETWORK PROTOCOL</title>
301
405
</tbody></tgroup></table>
304
408
<refsect1 id="checking">
305
409
<title>CHECKING</title>
307
411
The server will, by default, continually check that the clients
308
412
are still up. If a client has not been confirmed as being up
309
413
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>
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>
419
<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>
313
430
<refentrytitle>mandos-clients.conf</refentrytitle>
314
<manvolnum>5</manvolnum></citerefentry>.
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.
318
443
<refsect1 id="logging">
319
444
<title>LOGGING</title>
321
446
The server will send log message with various severity levels to
322
<filename>/dev/log</filename>. With the
447
<filename class="devicefile">/dev/log</filename>. With the
323
448
<option>--debug</option> option, it will log even more messages,
324
449
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>.
328
475
<refsect1 id="exit_status">
329
476
<title>EXIT STATUS</title>
511
660
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
663
For more details on client-side security, see
531
<citerefentry><refentrytitle>password-request</refentrytitle>
664
<citerefentry><refentrytitle>mandos-client</refentrytitle>
532
665
<manvolnum>8mandos</manvolnum></citerefentry>.
537
670
<refsect1 id="see_also">
538
671
<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>
673
<citerefentry><refentrytitle>intro</refentrytitle>
674
<manvolnum>8mandos</manvolnum></citerefentry>,
675
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
676
<manvolnum>5</manvolnum></citerefentry>,
677
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
678
<manvolnum>5</manvolnum></citerefentry>,
679
<citerefentry><refentrytitle>mandos-client</refentrytitle>
680
<manvolnum>8mandos</manvolnum></citerefentry>,
681
<citerefentry><refentrytitle>sh</refentrytitle>
682
<manvolnum>1</manvolnum></citerefentry>