19
19
<firstname>Björn</firstname>
20
20
<surname>Påhlsson</surname>
22
<email>belorn@fukt.bsnet.se</email>
22
<email>belorn@recompile.se</email>
26
26
<firstname>Teddy</firstname>
27
27
<surname>Hogeborn</surname>
29
<email>teddy@fukt.bsnet.se</email>
29
<email>teddy@recompile.se</email>
36
42
<holder>Teddy Hogeborn</holder>
37
43
<holder>Björn Påhlsson</holder>
87
93
<arg><option>--debug</option></arg>
95
<arg><option>--debuglevel
96
<replaceable>LEVEL</replaceable></option></arg>
89
98
<arg><option>--no-dbus</option></arg>
91
100
<arg><option>--no-ipv6</option></arg>
102
<arg><option>--no-restore</option></arg>
104
<arg><option>--statedir
105
<replaceable>DIRECTORY</replaceable></option></arg>
107
<arg><option>--socket
108
<replaceable>FD</replaceable></option></arg>
110
<arg><option>--foreground</option></arg>
112
<arg><option>--no-zeroconf</option></arg>
94
115
<command>&COMMANDNAME;</command>
113
134
<command>&COMMANDNAME;</command> is a server daemon which
114
135
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.
136
client host computers. For an introduction, see
137
<citerefentry><refentrytitle>intro</refentrytitle>
138
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
139
uses Zeroconf to announce itself on the local network, and uses
140
TLS to communicate securely with and to authenticate the
141
clients. The Mandos server uses IPv6 to allow Mandos clients to
142
use IPv6 link-local addresses, since the clients will probably
143
not have any other addresses configured (see <xref
144
linkend="overview"/>). Any authenticated client is then given
145
the stored pre-encrypted password for that specific client.
220
<term><option>--debuglevel
221
<replaceable>LEVEL</replaceable></option></term>
224
Set the debugging log level.
225
<replaceable>LEVEL</replaceable> is a string, one of
226
<quote><literal>CRITICAL</literal></quote>,
227
<quote><literal>ERROR</literal></quote>,
228
<quote><literal>WARNING</literal></quote>,
229
<quote><literal>INFO</literal></quote>, or
230
<quote><literal>DEBUG</literal></quote>, in order of
231
increasing verbosity. The default level is
232
<quote><literal>WARNING</literal></quote>.
197
238
<term><option>--priority <replaceable>
198
239
PRIORITY</replaceable></option></term>
250
291
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
296
<term><option>--no-restore</option></term>
298
<xi:include href="mandos-options.xml" xpointer="restore"/>
300
See also <xref linkend="persistent_state"/>.
306
<term><option>--statedir
307
<replaceable>DIRECTORY</replaceable></option></term>
309
<xi:include href="mandos-options.xml" xpointer="statedir"/>
314
<term><option>--socket
315
<replaceable>FD</replaceable></option></term>
317
<xi:include href="mandos-options.xml" xpointer="socket"/>
322
<term><option>--foreground</option></term>
324
<xi:include href="mandos-options.xml"
325
xpointer="foreground"/>
330
<term><option>--no-zeroconf</option></term>
332
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
329
412
for some time, the client is assumed to be compromised and is no
330
413
longer eligible to receive the encrypted password. (Manual
331
414
intervention is required to re-enable a client.) The timeout,
332
checker program, and interval between checks can be configured
333
both globally and per client; see <citerefentry>
415
extended timeout, checker program, and interval between checks
416
can be configured both globally and per client; see
417
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
418
<manvolnum>5</manvolnum></citerefentry>.
422
<refsect1 id="approval">
423
<title>APPROVAL</title>
425
The server can be configured to require manual approval for a
426
client before it is sent its secret. The delay to wait for such
427
approval and the default action (approve or deny) can be
428
configured both globally and per client; see <citerefentry>
334
429
<refentrytitle>mandos-clients.conf</refentrytitle>
335
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
receiving its password will also be treated as a successful
430
<manvolnum>5</manvolnum></citerefentry>. By default all clients
431
will be approved immediately without delay.
434
This can be used to deny a client its secret if not manually
435
approved within a specified time. It can also be used to make
436
the server delay before giving a client its secret, allowing
437
optional manual denying of this specific client.
341
442
<refsect1 id="logging">
342
443
<title>LOGGING</title>
344
445
The server will send log message with various severity levels to
345
<filename>/dev/log</filename>. With the
446
<filename class="devicefile">/dev/log</filename>. With the
346
447
<option>--debug</option> option, it will log even more messages,
347
448
and also show them on the console.
452
<refsect1 id="persistent_state">
453
<title>PERSISTENT STATE</title>
455
Client settings, initially read from
456
<filename>clients.conf</filename>, are persistent across
457
restarts, and run-time changes will override settings in
458
<filename>clients.conf</filename>. However, if a setting is
459
<emphasis>changed</emphasis> (or a client added, or removed) in
460
<filename>clients.conf</filename>, this will take precedence.
351
464
<refsect1 id="dbus_interface">
352
465
<title>D-BUS INTERFACE</title>
354
467
The server will by default provide a D-Bus system bus interface.
355
468
This interface will only be accessible by the root user or a
356
Mandos-specific user, if such a user exists.
469
Mandos-specific user, if such a user exists. For documentation
470
of the D-Bus API, see the file <filename>DBUS-API</filename>.
418
<term><filename>/var/run/mandos.pid</filename></term>
421
The file containing the process id of
422
<command>&COMMANDNAME;</command>.
531
<term><filename>/run/mandos.pid</filename></term>
534
The file containing the process id of the
535
<command>&COMMANDNAME;</command> process started last.
536
<emphasis >Note:</emphasis> If the <filename
537
class="directory">/run</filename> directory does not
538
exist, <filename>/var/run/mandos.pid</filename> will be
544
<term><filename class="devicefile">/dev/log</filename></term>
548
class="directory">/var/lib/mandos</filename></term>
551
Directory where persistent state will be saved. Change
552
this with the <option>--statedir</option> option. See
553
also the <option>--no-restore</option> option.
453
584
backtrace. This could be considered a feature.
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"/>.
461
There is currently no way of querying the server of the current
462
status of clients, other than analyzing its <systemitem
463
class="service">syslog</systemitem> output.
466
587
There is no fine-grained control over logging and debug output.
469
Debug mode is conflated with running in the foreground.
472
The console log messages do not show a time stamp.
475
590
This server does not check the expire time of clients’ OpenPGP
490
605
<informalexample>
492
607
Run the server in debug mode, read configuration files from
493
the <filename>~/mandos</filename> directory, and use the
494
Zeroconf service name <quote>Test</quote> to not collide with
495
any other official Mandos server on this host:
608
the <filename class="directory">~/mandos</filename> directory,
609
and use the Zeroconf service name <quote>Test</quote> to not
610
collide with any other official Mandos server on this host:
547
662
compromised if they are gone for too long.
550
If a client is compromised, its downtime should be duly noted
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.
565
665
For more details on client-side security, see
566
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
567
667
<manvolnum>8mandos</manvolnum></citerefentry>.
572
672
<refsect1 id="see_also">
573
673
<title>SEE ALSO</title>
576
<refentrytitle>mandos-clients.conf</refentrytitle>
577
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
578
<refentrytitle>mandos.conf</refentrytitle>
579
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
580
<refentrytitle>mandos-client</refentrytitle>
581
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
582
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
675
<citerefentry><refentrytitle>intro</refentrytitle>
676
<manvolnum>8mandos</manvolnum></citerefentry>,
677
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
678
<manvolnum>5</manvolnum></citerefentry>,
679
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
680
<manvolnum>5</manvolnum></citerefentry>,
681
<citerefentry><refentrytitle>mandos-client</refentrytitle>
682
<manvolnum>8mandos</manvolnum></citerefentry>,
683
<citerefentry><refentrytitle>sh</refentrytitle>
684
<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
