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 "2015-07-20">
6
<!ENTITY % common SYSTEM "common.ent">
6
<!ENTITY TIMESTAMP "2008-09-12">
10
9
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
12
11
<title>Mandos Manual</title>
13
12
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
14
13
<productname>Mandos</productname>
15
<productnumber>&version;</productnumber>
14
<productnumber>&VERSION;</productnumber>
16
15
<date>&TIMESTAMP;</date>
19
18
<firstname>Björn</firstname>
20
19
<surname>Påhlsson</surname>
22
<email>belorn@recompile.se</email>
21
<email>belorn@fukt.bsnet.se</email>
26
25
<firstname>Teddy</firstname>
27
26
<surname>Hogeborn</surname>
29
<email>teddy@recompile.se</email>
28
<email>teddy@fukt.bsnet.se</email>
40
34
<holder>Teddy Hogeborn</holder>
41
35
<holder>Björn Påhlsson</holder>
89
83
<replaceable>DIRECTORY</replaceable></option></arg>
91
85
<arg><option>--debug</option></arg>
93
<arg><option>--debuglevel
94
<replaceable>LEVEL</replaceable></option></arg>
96
<arg><option>--no-dbus</option></arg>
98
<arg><option>--no-ipv6</option></arg>
100
<arg><option>--no-restore</option></arg>
102
<arg><option>--statedir
103
<replaceable>DIRECTORY</replaceable></option></arg>
105
<arg><option>--socket
106
<replaceable>FD</replaceable></option></arg>
108
<arg><option>--foreground</option></arg>
110
<arg><option>--no-zeroconf</option></arg>
113
88
<command>&COMMANDNAME;</command>
132
107
<command>&COMMANDNAME;</command> is a server daemon which
133
108
handles incoming request for passwords for a pre-defined list of
134
client host computers. For an introduction, see
135
<citerefentry><refentrytitle>intro</refentrytitle>
136
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
137
uses Zeroconf to announce itself on the local network, and uses
138
TLS to communicate securely with and to authenticate the
139
clients. The Mandos server uses IPv6 to allow Mandos clients to
140
use IPv6 link-local addresses, since the clients will probably
141
not have any other addresses configured (see <xref
142
linkend="overview"/>). Any authenticated client is then given
143
the stored pre-encrypted password for that specific client.
109
client host computers. The Mandos server uses Zeroconf to
110
announce itself on the local network, and uses TLS to
111
communicate securely with and to authenticate the clients. The
112
Mandos server uses IPv6 to allow Mandos clients to use IPv6
113
link-local addresses, since the clients will probably not have
114
any other addresses configured (see <xref linkend="overview"/>).
115
Any authenticated client is then given the stored pre-encrypted
116
password for that specific client.
218
<term><option>--debuglevel
219
<replaceable>LEVEL</replaceable></option></term>
222
Set the debugging log level.
223
<replaceable>LEVEL</replaceable> is a string, one of
224
<quote><literal>CRITICAL</literal></quote>,
225
<quote><literal>ERROR</literal></quote>,
226
<quote><literal>WARNING</literal></quote>,
227
<quote><literal>INFO</literal></quote>, or
228
<quote><literal>DEBUG</literal></quote>, in order of
229
increasing verbosity. The default level is
230
<quote><literal>WARNING</literal></quote>.
236
191
<term><option>--priority <replaceable>
237
192
PRIORITY</replaceable></option></term>
277
<term><option>--no-dbus</option></term>
279
<xi:include href="mandos-options.xml" xpointer="dbus"/>
281
See also <xref linkend="dbus_interface"/>.
287
<term><option>--no-ipv6</option></term>
289
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
294
<term><option>--no-restore</option></term>
296
<xi:include href="mandos-options.xml" xpointer="restore"/>
298
See also <xref linkend="persistent_state"/>.
304
<term><option>--statedir
305
<replaceable>DIRECTORY</replaceable></option></term>
307
<xi:include href="mandos-options.xml" xpointer="statedir"/>
312
<term><option>--socket
313
<replaceable>FD</replaceable></option></term>
315
<xi:include href="mandos-options.xml" xpointer="socket"/>
320
<term><option>--foreground</option></term>
322
<xi:include href="mandos-options.xml"
323
xpointer="foreground"/>
328
<term><option>--no-zeroconf</option></term>
330
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
408
304
The server will, by default, continually check that the clients
409
305
are still up. If a client has not been confirmed as being up
410
306
for some time, the client is assumed to be compromised and is no
411
longer eligible to receive the encrypted password. (Manual
412
intervention is required to re-enable a client.) The timeout,
413
extended timeout, checker program, and interval between checks
414
can be configured both globally and per client; see
415
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
307
longer eligible to receive the encrypted password. The timeout,
308
checker program, and interval between checks can be configured
309
both globally and per client; see <citerefentry>
310
<refentrytitle>mandos-clients.conf</refentrytitle>
416
311
<manvolnum>5</manvolnum></citerefentry>.
420
<refsect1 id="approval">
421
<title>APPROVAL</title>
423
The server can be configured to require manual approval for a
424
client before it is sent its secret. The delay to wait for such
425
approval and the default action (approve or deny) can be
426
configured both globally and per client; see <citerefentry>
427
<refentrytitle>mandos-clients.conf</refentrytitle>
428
<manvolnum>5</manvolnum></citerefentry>. By default all clients
429
will be approved immediately without delay.
432
This can be used to deny a client its secret if not manually
433
approved within a specified time. It can also be used to make
434
the server delay before giving a client its secret, allowing
435
optional manual denying of this specific client.
440
315
<refsect1 id="logging">
441
316
<title>LOGGING</title>
443
318
The server will send log message with various severity levels to
444
<filename class="devicefile">/dev/log</filename>. With the
319
<filename>/dev/log</filename>. With the
445
320
<option>--debug</option> option, it will log even more messages,
446
321
and also show them on the console.
450
<refsect1 id="persistent_state">
451
<title>PERSISTENT STATE</title>
453
Client settings, initially read from
454
<filename>clients.conf</filename>, are persistent across
455
restarts, and run-time changes will override settings in
456
<filename>clients.conf</filename>. However, if a setting is
457
<emphasis>changed</emphasis> (or a client added, or removed) in
458
<filename>clients.conf</filename>, this will take precedence.
462
<refsect1 id="dbus_interface">
463
<title>D-BUS INTERFACE</title>
465
The server will by default provide a D-Bus system bus interface.
466
This interface will only be accessible by the root user or a
467
Mandos-specific user, if such a user exists. For documentation
468
of the D-Bus API, see the file <filename>DBUS-API</filename>.
472
325
<refsect1 id="exit_status">
473
326
<title>EXIT STATUS</title>
529
<term><filename>/run/mandos.pid</filename></term>
532
The file containing the process id of the
533
<command>&COMMANDNAME;</command> process started last.
534
<emphasis >Note:</emphasis> If the <filename
535
class="directory">/run</filename> directory does not
536
exist, <filename>/var/run/mandos.pid</filename> will be
542
<term><filename class="devicefile">/dev/log</filename></term>
546
class="directory">/var/lib/mandos</filename></term>
549
Directory where persistent state will be saved. Change
550
this with the <option>--statedir</option> option. See
551
also the <option>--no-restore</option> option.
382
<term><filename>/var/run/mandos.pid</filename></term>
385
The file containing the process id of
386
<command>&COMMANDNAME;</command>.
582
417
backtrace. This could be considered a feature.
420
Currently, if a client is declared <quote>invalid</quote> due to
421
having timed out, the server does not record this fact onto
422
permanent storage. This has some security implications, see
423
<xref linkend="CLIENTS"/>.
426
There is currently no way of querying the server of the current
427
status of clients, other than analyzing its <systemitem
428
class="service">syslog</systemitem> output.
585
431
There is no fine-grained control over logging and debug output.
434
Debug mode is conflated with running in the foreground.
437
The console log messages does not show a time stamp.
588
440
This server does not check the expire time of clients’ OpenPGP
603
455
<informalexample>
605
457
Run the server in debug mode, read configuration files from
606
the <filename class="directory">~/mandos</filename> directory,
607
and use the Zeroconf service name <quote>Test</quote> to not
608
collide with any other official Mandos server on this host:
458
the <filename>~/mandos</filename> directory, and use the
459
Zeroconf service name <quote>Test</quote> to not collide with
460
any other official Mandos server on this host:
660
512
compromised if they are gone for too long.
515
If a client is compromised, its downtime should be duly noted
516
by the server which would therefore declare the client
517
invalid. But if the server was ever restarted, it would
518
re-read its client list from its configuration file and again
519
regard all clients therein as valid, and hence eligible to
520
receive their passwords. Therefore, be careful when
521
restarting servers if it is suspected that a client has, in
522
fact, been compromised by parties who may now be running a
523
fake Mandos client with the keys from the non-encrypted
524
initial <acronym>RAM</acronym> image of the client host. What
525
should be done in that case (if restarting the server program
526
really is necessary) is to stop the server program, edit the
527
configuration file to omit any suspect clients, and restart
663
531
For more details on client-side security, see
664
532
<citerefentry><refentrytitle>mandos-client</refentrytitle>
665
533
<manvolnum>8mandos</manvolnum></citerefentry>.
670
538
<refsect1 id="see_also">
671
539
<title>SEE ALSO</title>
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>
542
<refentrytitle>mandos-clients.conf</refentrytitle>
543
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
544
<refentrytitle>mandos.conf</refentrytitle>
545
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
546
<refentrytitle>mandos-client</refentrytitle>
547
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
548
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>