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>
35
42
<holder>Teddy Hogeborn</holder>
36
43
<holder>Björn Påhlsson</holder>
84
91
<replaceable>DIRECTORY</replaceable></option></arg>
86
93
<arg><option>--debug</option></arg>
95
<arg><option>--debuglevel
96
<replaceable>LEVEL</replaceable></option></arg>
98
<arg><option>--no-dbus</option></arg>
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>
89
115
<command>&COMMANDNAME;</command>
108
134
<command>&COMMANDNAME;</command> is a server daemon which
109
135
handles incoming request for passwords for a pre-defined list of
110
client host computers. The Mandos server uses Zeroconf to
111
announce itself on the local network, and uses TLS to
112
communicate securely with and to authenticate the clients. The
113
Mandos server uses IPv6 to allow Mandos clients to use IPv6
114
link-local addresses, since the clients will probably not have
115
any other addresses configured (see <xref linkend="overview"/>).
116
Any authenticated client is then given the stored pre-encrypted
117
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>.
192
238
<term><option>--priority <replaceable>
193
239
PRIORITY</replaceable></option></term>
279
<term><option>--no-dbus</option></term>
281
<xi:include href="mandos-options.xml" xpointer="dbus"/>
283
See also <xref linkend="dbus_interface"/>.
289
<term><option>--no-ipv6</option></term>
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"/>
305
410
The server will, by default, continually check that the clients
306
411
are still up. If a client has not been confirmed as being up
307
412
for some time, the client is assumed to be compromised and is no
308
longer eligible to receive the encrypted password. The timeout,
309
checker program, and interval between checks can be configured
310
both globally and per client; see <citerefentry>
413
longer eligible to receive the encrypted password. (Manual
414
intervention is required to re-enable a client.) The timeout,
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>
311
429
<refentrytitle>mandos-clients.conf</refentrytitle>
312
<manvolnum>5</manvolnum></citerefentry>.
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.
316
442
<refsect1 id="logging">
317
443
<title>LOGGING</title>
319
445
The server will send log message with various severity levels to
320
<filename>/dev/log</filename>. With the
446
<filename class="devicefile">/dev/log</filename>. With the
321
447
<option>--debug</option> option, it will log even more messages,
322
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.
464
<refsect1 id="dbus_interface">
465
<title>D-BUS INTERFACE</title>
467
The server will by default provide a D-Bus system bus interface.
468
This interface will only be accessible by the root user or a
469
Mandos-specific user, if such a user exists. For documentation
470
of the D-Bus API, see the file <filename>DBUS-API</filename>.
326
474
<refsect1 id="exit_status">
327
475
<title>EXIT STATUS</title>
383
<term><filename>/var/run/mandos.pid</filename></term>
386
The file containing the process id of
387
<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.
418
584
backtrace. This could be considered a feature.
421
Currently, if a client is declared <quote>invalid</quote> due to
422
having timed out, the server does not record this fact onto
423
permanent storage. This has some security implications, see
424
<xref linkend="clients"/>.
427
There is currently no way of querying the server of the current
428
status of clients, other than analyzing its <systemitem
429
class="service">syslog</systemitem> output.
432
587
There is no fine-grained control over logging and debug output.
435
Debug mode is conflated with running in the foreground.
438
The console log messages does not show a time stamp.
441
590
This server does not check the expire time of clients’ OpenPGP
456
605
<informalexample>
458
607
Run the server in debug mode, read configuration files from
459
the <filename>~/mandos</filename> directory, and use the
460
Zeroconf service name <quote>Test</quote> to not collide with
461
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:
513
662
compromised if they are gone for too long.
516
If a client is compromised, its downtime should be duly noted
517
by the server which would therefore declare the client
518
invalid. But if the server was ever restarted, it would
519
re-read its client list from its configuration file and again
520
regard all clients therein as valid, and hence eligible to
521
receive their passwords. Therefore, be careful when
522
restarting servers if it is suspected that a client has, in
523
fact, been compromised by parties who may now be running a
524
fake Mandos client with the keys from the non-encrypted
525
initial <acronym>RAM</acronym> image of the client host. What
526
should be done in that case (if restarting the server program
527
really is necessary) is to stop the server program, edit the
528
configuration file to omit any suspect clients, and restart
532
665
For more details on client-side security, see
533
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
534
667
<manvolnum>8mandos</manvolnum></citerefentry>.
539
672
<refsect1 id="see_also">
540
673
<title>SEE ALSO</title>
543
<refentrytitle>mandos-clients.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>mandos.conf</refentrytitle>
546
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
547
<refentrytitle>mandos-client</refentrytitle>
548
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
549
<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
