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
40
<holder>Teddy Hogeborn</holder>
37
41
<holder>Björn Påhlsson</holder>
87
91
<arg><option>--debug</option></arg>
93
<arg><option>--debuglevel
94
<replaceable>LEVEL</replaceable></option></arg>
89
96
<arg><option>--no-dbus</option></arg>
91
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>
94
111
<command>&COMMANDNAME;</command>
113
130
<command>&COMMANDNAME;</command> is a server daemon which
114
131
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.
132
client host computers. For an introduction, see
133
<citerefentry><refentrytitle>intro</refentrytitle>
134
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
135
uses Zeroconf to announce itself on the local network, and uses
136
TLS to communicate securely with and to authenticate the
137
clients. The Mandos server uses IPv6 to allow Mandos clients to
138
use IPv6 link-local addresses, since the clients will probably
139
not have any other addresses configured (see <xref
140
linkend="overview"/>). Any authenticated client is then given
141
the stored pre-encrypted password for that specific client.
216
<term><option>--debuglevel
217
<replaceable>LEVEL</replaceable></option></term>
220
Set the debugging log level.
221
<replaceable>LEVEL</replaceable> is a string, one of
222
<quote><literal>CRITICAL</literal></quote>,
223
<quote><literal>ERROR</literal></quote>,
224
<quote><literal>WARNING</literal></quote>,
225
<quote><literal>INFO</literal></quote>, or
226
<quote><literal>DEBUG</literal></quote>, in order of
227
increasing verbosity. The default level is
228
<quote><literal>WARNING</literal></quote>.
197
234
<term><option>--priority <replaceable>
198
235
PRIORITY</replaceable></option></term>
250
287
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
292
<term><option>--no-restore</option></term>
294
<xi:include href="mandos-options.xml" xpointer="restore"/>
296
See also <xref linkend="persistent_state"/>.
302
<term><option>--statedir
303
<replaceable>DIRECTORY</replaceable></option></term>
305
<xi:include href="mandos-options.xml" xpointer="statedir"/>
310
<term><option>--socket
311
<replaceable>FD</replaceable></option></term>
313
<xi:include href="mandos-options.xml" xpointer="socket"/>
318
<term><option>--foreground</option></term>
320
<xi:include href="mandos-options.xml"
321
xpointer="foreground"/>
329
401
for some time, the client is assumed to be compromised and is no
330
402
longer eligible to receive the encrypted password. (Manual
331
403
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>
404
extended timeout, checker program, and interval between checks
405
can be configured both globally and per client; see
406
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
407
<manvolnum>5</manvolnum></citerefentry>.
411
<refsect1 id="approval">
412
<title>APPROVAL</title>
414
The server can be configured to require manual approval for a
415
client before it is sent its secret. The delay to wait for such
416
approval and the default action (approve or deny) can be
417
configured both globally and per client; see <citerefentry>
334
418
<refentrytitle>mandos-clients.conf</refentrytitle>
335
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
receiving its password will also be treated as a successful
419
<manvolnum>5</manvolnum></citerefentry>. By default all clients
420
will be approved immediately without delay.
423
This can be used to deny a client its secret if not manually
424
approved within a specified time. It can also be used to make
425
the server delay before giving a client its secret, allowing
426
optional manual denying of this specific client.
341
431
<refsect1 id="logging">
342
432
<title>LOGGING</title>
344
434
The server will send log message with various severity levels to
345
<filename>/dev/log</filename>. With the
435
<filename class="devicefile">/dev/log</filename>. With the
346
436
<option>--debug</option> option, it will log even more messages,
347
437
and also show them on the console.
441
<refsect1 id="persistent_state">
442
<title>PERSISTENT STATE</title>
444
Client settings, initially read from
445
<filename>clients.conf</filename>, are persistent across
446
restarts, and run-time changes will override settings in
447
<filename>clients.conf</filename>. However, if a setting is
448
<emphasis>changed</emphasis> (or a client added, or removed) in
449
<filename>clients.conf</filename>, this will take precedence.
351
453
<refsect1 id="dbus_interface">
352
454
<title>D-BUS INTERFACE</title>
354
456
The server will by default provide a D-Bus system bus interface.
355
457
This interface will only be accessible by the root user or a
356
Mandos-specific user, if such a user exists.
458
Mandos-specific user, if such a user exists. For documentation
459
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>.
520
<term><filename>/run/mandos.pid</filename></term>
523
The file containing the process id of the
524
<command>&COMMANDNAME;</command> process started last.
529
<term><filename class="devicefile">/dev/log</filename></term>
533
class="directory">/var/lib/mandos</filename></term>
536
Directory where persistent state will be saved. Change
537
this with the <option>--statedir</option> option. See
538
also the <option>--no-restore</option> option.
453
569
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
572
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
575
This server does not check the expire time of clients’ OpenPGP
490
590
<informalexample>
492
592
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:
593
the <filename class="directory">~/mandos</filename> directory,
594
and use the Zeroconf service name <quote>Test</quote> to not
595
collide with any other official Mandos server on this host:
547
647
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
650
For more details on client-side security, see
566
651
<citerefentry><refentrytitle>mandos-client</refentrytitle>
567
652
<manvolnum>8mandos</manvolnum></citerefentry>.
572
657
<refsect1 id="see_also">
573
658
<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>
660
<citerefentry><refentrytitle>intro</refentrytitle>
661
<manvolnum>8mandos</manvolnum></citerefentry>,
662
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
663
<manvolnum>5</manvolnum></citerefentry>,
664
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
665
<manvolnum>5</manvolnum></citerefentry>,
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
667
<manvolnum>8mandos</manvolnum></citerefentry>,
668
<citerefentry><refentrytitle>sh</refentrytitle>
669
<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
