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 "2008-08-29">
5
<!ENTITY TIMESTAMP "2009-12-09">
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>
34
36
<holder>Teddy Hogeborn</holder>
35
37
<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/"/>.
39
<xi:include href="legalnotice.xml"/>
63
43
<refentrytitle>&COMMANDNAME;</refentrytitle>
64
44
<manvolnum>8</manvolnum>
68
48
<refname><command>&COMMANDNAME;</command></refname>
70
Sends encrypted passwords to authenticated Mandos clients
50
Gives encrypted passwords to authenticated Mandos clients
76
56
<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>
58
<arg choice="plain"><option>--interface
59
<replaceable>NAME</replaceable></option></arg>
60
<arg choice="plain"><option>-i
61
<replaceable>NAME</replaceable></option></arg>
65
<arg choice="plain"><option>--address
66
<replaceable>ADDRESS</replaceable></option></arg>
67
<arg choice="plain"><option>-a
68
<replaceable>ADDRESS</replaceable></option></arg>
72
<arg choice="plain"><option>--port
73
<replaceable>PORT</replaceable></option></arg>
74
<arg choice="plain"><option>-p
75
<replaceable>PORT</replaceable></option></arg>
78
<arg><option>--priority
79
<replaceable>PRIORITY</replaceable></option></arg>
81
<arg><option>--servicename
82
<replaceable>NAME</replaceable></option></arg>
84
<arg><option>--configdir
85
<replaceable>DIRECTORY</replaceable></option></arg>
87
<arg><option>--debug</option></arg>
89
<arg><option>--no-dbus</option></arg>
91
<arg><option>--no-ipv6</option></arg>
96
94
<command>&COMMANDNAME;</command>
97
95
<group choice="req">
98
<arg choice="plain">-h</arg>
99
<arg choice="plain">--help</arg>
96
<arg choice="plain"><option>--help</option></arg>
97
<arg choice="plain"><option>-h</option></arg>
103
101
<command>&COMMANDNAME;</command>
104
<arg choice="plain">--version</arg>
102
<arg choice="plain"><option>--version</option></arg>
107
105
<command>&COMMANDNAME;</command>
108
<arg choice="plain">--check</arg>
106
<arg choice="plain"><option>--check</option></arg>
110
108
</refsynopsisdiv>
112
110
<refsect1 id="description">
113
111
<title>DESCRIPTION</title>
123
121
Any authenticated client is then given the stored pre-encrypted
124
122
password for that specific client.
129
126
<refsect1 id="purpose">
130
127
<title>PURPOSE</title>
133
129
The purpose of this is to enable <emphasis>remote and unattended
134
130
rebooting</emphasis> of client host computer with an
135
131
<emphasis>encrypted root file system</emphasis>. See <xref
136
132
linkend="overview"/> for details.
141
136
<refsect1 id="options">
142
137
<title>OPTIONS</title>
140
<term><option>--help</option></term>
146
141
<term><option>-h</option></term>
147
<term><option>--help</option></term>
150
144
Show a help message and exit
150
<term><option>--interface</option>
151
<replaceable>NAME</replaceable></term>
156
152
<term><option>-i</option>
157
153
<replaceable>NAME</replaceable></term>
158
<term><option>--interface</option>
159
<replaceable>NAME</replaceable></term>
161
155
<xi:include href="mandos-options.xml" xpointer="interface"/>
166
<term><literal>-a</literal>, <literal>--address <replaceable>
167
ADDRESS</replaceable></literal></term>
160
<term><option>--address
161
<replaceable>ADDRESS</replaceable></option></term>
163
<replaceable>ADDRESS</replaceable></option></term>
169
165
<xi:include href="mandos-options.xml" xpointer="address"/>
174
<term><literal>-p</literal>, <literal>--port <replaceable>
175
PORT</replaceable></literal></term>
171
<replaceable>PORT</replaceable></option></term>
173
<replaceable>PORT</replaceable></option></term>
177
175
<xi:include href="mandos-options.xml" xpointer="port"/>
182
<term><literal>--check</literal></term>
180
<term><option>--check</option></term>
185
183
Run the server’s self-tests. This includes any unit
192
<term><literal>--debug</literal></term>
190
<term><option>--debug</option></term>
194
192
<xi:include href="mandos-options.xml" xpointer="debug"/>
199
<term><literal>--priority <replaceable>
200
PRIORITY</replaceable></literal></term>
197
<term><option>--priority <replaceable>
198
PRIORITY</replaceable></option></term>
202
200
<xi:include href="mandos-options.xml" xpointer="priority"/>
207
<term><literal>--servicename <replaceable>NAME</replaceable>
205
<term><option>--servicename
206
<replaceable>NAME</replaceable></option></term>
210
208
<xi:include href="mandos-options.xml"
211
209
xpointer="servicename"/>
216
<term><literal>--configdir <replaceable>DIR</replaceable>
214
<term><option>--configdir
215
<replaceable>DIRECTORY</replaceable></option></term>
220
218
Directory to search for configuration files. Default is
231
<term><literal>--version</literal></term>
229
<term><option>--version</option></term>
234
232
Prints the program version and exit.
238
<term><option>--no-dbus</option></term>
240
<xi:include href="mandos-options.xml" xpointer="dbus"/>
242
See also <xref linkend="dbus_interface"/>.
248
<term><option>--no-ipv6</option></term>
250
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
241
256
<refsect1 id="overview">
242
257
<title>OVERVIEW</title>
243
258
<xi:include href="overview.xml"/>
245
260
This program is the server part. It is a normal server program
246
261
and will run in a normal system environment, not in an initial
247
RAM disk environment.
262
<acronym>RAM</acronym> disk environment.
251
266
<refsect1 id="protocol">
252
267
<title>NETWORK PROTOCOL</title>
306
321
</tbody></tgroup></table>
309
324
<refsect1 id="checking">
310
325
<title>CHECKING</title>
312
327
The server will, by default, continually check that the clients
313
328
are still up. If a client has not been confirmed as being up
314
329
for some time, the client is assumed to be compromised and is no
315
longer eligible to receive the encrypted password. The timeout,
330
longer eligible to receive the encrypted password. (Manual
331
intervention is required to re-enable a client.) The timeout,
316
332
checker program, and interval between checks can be configured
317
333
both globally and per client; see <citerefentry>
318
334
<refentrytitle>mandos-clients.conf</refentrytitle>
319
<manvolnum>5</manvolnum></citerefentry>.
335
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
receiving its password will also be treated as a successful
323
341
<refsect1 id="logging">
324
342
<title>LOGGING</title>
329
347
and also show them on the console.
351
<refsect1 id="dbus_interface">
352
<title>D-BUS INTERFACE</title>
354
The server will by default provide a D-Bus system bus interface.
355
This interface will only be accessible by the root user or a
356
Mandos-specific user, if such a user exists.
333
361
<refsect1 id="exit_status">
334
362
<title>EXIT STATUS</title>
425
453
backtrace. This could be considered a feature.
428
Currently, if a client is declared <quote>invalid</quote> due to
429
having timed out, the server does not record this fact onto
430
permanent storage. This has some security implications, see
431
<xref linkend="CLIENTS"/>.
456
Currently, if a client is disabled due to having timed out, the
457
server does not record this fact onto permanent storage. This
458
has some security implications, see <xref linkend="clients"/>.
434
461
There is currently no way of querying the server of the current
484
515
</informalexample>
487
518
<refsect1 id="security">
488
519
<title>SECURITY</title>
489
<refsect2 id="SERVER">
520
<refsect2 id="server">
490
521
<title>SERVER</title>
492
523
Running this <command>&COMMANDNAME;</command> server program
493
524
should not in itself present any security risk to the host
494
computer running it. The program does not need any special
495
privileges to run, and is designed to run as a non-root user.
525
computer running it. The program switches to a non-root user
498
<refsect2 id="CLIENTS">
529
<refsect2 id="clients">
499
530
<title>CLIENTS</title>
501
532
The server only gives out its stored data to clients which
508
539
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
509
540
<manvolnum>5</manvolnum></citerefentry>)
510
541
<emphasis>must</emphasis> be made non-readable by anyone
511
except the user running the server.
542
except the user starting the server (usually root).
514
545
As detailed in <xref linkend="checking"/>, the status of all
519
550
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
551
by the server which would therefore disable the client. But
552
if the server was ever restarted, it would re-read its client
553
list from its configuration file and again regard all clients
554
therein as enabled, and hence eligible to receive their
555
passwords. Therefore, be careful when restarting servers if
556
it is suspected that a client has, in fact, been compromised
557
by parties who may now be running a fake Mandos client with
558
the keys from the non-encrypted initial <acronym>RAM</acronym>
559
image of the client host. What should be done in that case
560
(if restarting the server program really is necessary) is to
561
stop the server program, edit the configuration file to omit
562
any suspect clients, and restart the server program.
535
565
For more details on client-side security, see
536
<citerefentry><refentrytitle>password-request</refentrytitle>
566
<citerefentry><refentrytitle>mandos-client</refentrytitle>
537
567
<manvolnum>8mandos</manvolnum></citerefentry>.
542
572
<refsect1 id="see_also">
543
573
<title>SEE ALSO</title>
547
577
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
548
578
<refentrytitle>mandos.conf</refentrytitle>
549
579
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
550
<refentrytitle>password-request</refentrytitle>
580
<refentrytitle>mandos-client</refentrytitle>
551
581
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
552
582
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>