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 "2010-09-11">
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>
32
36
<holder>Teddy Hogeborn</holder>
33
37
<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/"/>.
39
<xi:include href="legalnotice.xml"/>
61
43
<refentrytitle>&COMMANDNAME;</refentrytitle>
62
44
<manvolnum>8</manvolnum>
66
48
<refname><command>&COMMANDNAME;</command></refname>
68
Sends encrypted passwords to authenticated Mandos clients
50
Gives encrypted passwords to authenticated Mandos clients
74
56
<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>
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>
94
94
<command>&COMMANDNAME;</command>
95
95
<group choice="req">
96
<arg choice="plain">-h</arg>
97
<arg choice="plain">--help</arg>
96
<arg choice="plain"><option>--help</option></arg>
97
<arg choice="plain"><option>-h</option></arg>
101
101
<command>&COMMANDNAME;</command>
102
<arg choice="plain">--version</arg>
102
<arg choice="plain"><option>--version</option></arg>
105
105
<command>&COMMANDNAME;</command>
106
<arg choice="plain">--check</arg>
106
<arg choice="plain"><option>--check</option></arg>
108
108
</refsynopsisdiv>
110
110
<refsect1 id="description">
111
111
<title>DESCRIPTION</title>
121
121
Any authenticated client is then given the stored pre-encrypted
122
122
password for that specific client.
127
126
<refsect1 id="purpose">
128
127
<title>PURPOSE</title>
131
129
The purpose of this is to enable <emphasis>remote and unattended
132
130
rebooting</emphasis> of client host computer with an
133
131
<emphasis>encrypted root file system</emphasis>. See <xref
134
132
linkend="overview"/> for details.
139
136
<refsect1 id="options">
140
137
<title>OPTIONS</title>
144
<term><literal>-h</literal>, <literal>--help</literal></term>
140
<term><option>--help</option></term>
141
<term><option>-h</option></term>
147
144
Show a help message and exit
153
<term><literal>-i</literal>, <literal>--interface <replaceable
154
>NAME</replaceable></literal></term>
150
<term><option>--interface</option>
151
<replaceable>NAME</replaceable></term>
152
<term><option>-i</option>
153
<replaceable>NAME</replaceable></term>
156
155
<xi:include href="mandos-options.xml" xpointer="interface"/>
161
<term><literal>-a</literal>, <literal>--address <replaceable>
162
ADDRESS</replaceable></literal></term>
160
<term><option>--address
161
<replaceable>ADDRESS</replaceable></option></term>
163
<replaceable>ADDRESS</replaceable></option></term>
164
165
<xi:include href="mandos-options.xml" xpointer="address"/>
169
<term><literal>-p</literal>, <literal>--port <replaceable>
170
PORT</replaceable></literal></term>
171
<replaceable>PORT</replaceable></option></term>
173
<replaceable>PORT</replaceable></option></term>
172
175
<xi:include href="mandos-options.xml" xpointer="port"/>
177
<term><literal>--check</literal></term>
180
<term><option>--check</option></term>
180
183
Run the server’s self-tests. This includes any unit
187
<term><literal>--debug</literal></term>
190
<term><option>--debug</option></term>
189
192
<xi:include href="mandos-options.xml" xpointer="debug"/>
194
<term><literal>--priority <replaceable>
195
PRIORITY</replaceable></literal></term>
197
<term><option>--priority <replaceable>
198
PRIORITY</replaceable></option></term>
197
200
<xi:include href="mandos-options.xml" xpointer="priority"/>
202
<term><literal>--servicename <replaceable>NAME</replaceable>
205
<term><option>--servicename
206
<replaceable>NAME</replaceable></option></term>
205
208
<xi:include href="mandos-options.xml"
206
209
xpointer="servicename"/>
211
<term><literal>--configdir <replaceable>DIR</replaceable>
214
<term><option>--configdir
215
<replaceable>DIRECTORY</replaceable></option></term>
215
218
Directory to search for configuration files. Default is
226
<term><literal>--version</literal></term>
229
<term><option>--version</option></term>
229
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"/>
236
256
<refsect1 id="overview">
237
257
<title>OVERVIEW</title>
238
258
<xi:include href="overview.xml"/>
240
260
This program is the server part. It is a normal server program
241
261
and will run in a normal system environment, not in an initial
242
RAM disk environment.
262
<acronym>RAM</acronym> disk environment.
246
266
<refsect1 id="protocol">
247
267
<title>NETWORK PROTOCOL</title>
301
321
</tbody></tgroup></table>
304
324
<refsect1 id="checking">
305
325
<title>CHECKING</title>
307
327
The server will, by default, continually check that the clients
308
328
are still up. If a client has not been confirmed as being up
309
329
for some time, the client is assumed to be compromised and is no
310
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,
311
332
checker program, and interval between checks can be configured
312
333
both globally and per client; see <citerefentry>
313
334
<refentrytitle>mandos-clients.conf</refentrytitle>
314
<manvolnum>5</manvolnum></citerefentry>.
335
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
receiving its password will also be treated as a successful
318
341
<refsect1 id="logging">
319
342
<title>LOGGING</title>
324
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. For documentation
357
of the D-Bus API, see the file <filename>DBUS-API</filename>.
328
361
<refsect1 id="exit_status">
329
362
<title>EXIT STATUS</title>
420
453
backtrace. This could be considered a feature.
423
Currently, if a client is declared <quote>invalid</quote> due to
424
having timed out, the server does not record this fact onto
425
permanent storage. This has some security implications, see
426
<xref linkend="CLIENTS"/>.
429
There is currently no way of querying the server of the current
430
status of clients, other than analyzing its <systemitem
431
class="service">syslog</systemitem> output.
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 no fine-grained control over logging and debug output.
475
506
<!-- do not wrap this line -->
476
<userinput>mandos --interface eth7 --address fe80::aede:48ff:fe71:f6f2</userinput>
507
<userinput>&COMMANDNAME; --interface eth7 --address fe80::aede:48ff:fe71:f6f2</userinput>
479
510
</informalexample>
482
513
<refsect1 id="security">
483
514
<title>SECURITY</title>
484
<refsect2 id="SERVER">
515
<refsect2 id="server">
485
516
<title>SERVER</title>
487
518
Running this <command>&COMMANDNAME;</command> server program
488
519
should not in itself present any security risk to the host
489
computer running it. The program does not need any special
490
privileges to run, and is designed to run as a non-root user.
520
computer running it. The program switches to a non-root user
493
<refsect2 id="CLIENTS">
524
<refsect2 id="clients">
494
525
<title>CLIENTS</title>
496
527
The server only gives out its stored data to clients which
503
534
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
504
535
<manvolnum>5</manvolnum></citerefentry>)
505
536
<emphasis>must</emphasis> be made non-readable by anyone
506
except the user running the server.
537
except the user starting the server (usually root).
509
540
As detailed in <xref linkend="checking"/>, the status of all
514
545
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
546
by the server which would therefore disable the client. But
547
if the server was ever restarted, it would re-read its client
548
list from its configuration file and again regard all clients
549
therein as enabled, and hence eligible to receive their
550
passwords. Therefore, be careful when restarting servers if
551
it is suspected that a client has, in fact, been compromised
552
by parties who may now be running a fake Mandos client with
553
the keys from the non-encrypted initial <acronym>RAM</acronym>
554
image of the client host. What should be done in that case
555
(if restarting the server program really is necessary) is to
556
stop the server program, edit the configuration file to omit
557
any suspect clients, and restart the server program.
530
560
For more details on client-side security, see
531
<citerefentry><refentrytitle>password-request</refentrytitle>
561
<citerefentry><refentrytitle>mandos-client</refentrytitle>
532
562
<manvolnum>8mandos</manvolnum></citerefentry>.
537
567
<refsect1 id="see_also">
538
568
<title>SEE ALSO</title>
571
<refentrytitle>mandos-clients.conf</refentrytitle>
572
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
541
573
<refentrytitle>mandos.conf</refentrytitle>
542
574
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
543
<refentrytitle>mandos-clients.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>password-request</refentrytitle>
575
<refentrytitle>mandos-client</refentrytitle>
546
576
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
547
577
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>