19
19
<firstname>Björn</firstname>
20
20
<surname>Påhlsson</surname>
22
<email>belorn@recompile.se</email>
22
<email>belorn@fukt.bsnet.se</email>
26
26
<firstname>Teddy</firstname>
27
27
<surname>Hogeborn</surname>
29
<email>teddy@recompile.se</email>
29
<email>teddy@fukt.bsnet.se</email>
40
36
<holder>Teddy Hogeborn</holder>
41
37
<holder>Björn Påhlsson</holder>
91
87
<arg><option>--debug</option></arg>
93
<arg><option>--debuglevel
94
<replaceable>LEVEL</replaceable></option></arg>
96
89
<arg><option>--no-dbus</option></arg>
98
91
<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>
111
94
<command>&COMMANDNAME;</command>
130
113
<command>&COMMANDNAME;</command> is a server daemon which
131
114
handles incoming request for passwords for a pre-defined list of
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.
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.
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>.
234
197
<term><option>--priority <replaceable>
235
198
PRIORITY</replaceable></option></term>
237
<xi:include href="mandos-options.xml"
238
xpointer="priority_compat"/>
200
<xi:include href="mandos-options.xml" xpointer="priority"/>
288
250
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
293
<term><option>--no-restore</option></term>
295
<xi:include href="mandos-options.xml" xpointer="restore"/>
297
See also <xref linkend="persistent_state"/>.
303
<term><option>--statedir
304
<replaceable>DIRECTORY</replaceable></option></term>
306
<xi:include href="mandos-options.xml" xpointer="statedir"/>
311
<term><option>--socket
312
<replaceable>FD</replaceable></option></term>
314
<xi:include href="mandos-options.xml" xpointer="socket"/>
319
<term><option>--foreground</option></term>
321
<xi:include href="mandos-options.xml"
322
xpointer="foreground"/>
402
329
for some time, the client is assumed to be compromised and is no
403
330
longer eligible to receive the encrypted password. (Manual
404
331
intervention is required to re-enable a client.) The timeout,
405
extended timeout, checker program, and interval between checks
406
can be configured both globally and per client; see
407
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
408
<manvolnum>5</manvolnum></citerefentry>.
412
<refsect1 id="approval">
413
<title>APPROVAL</title>
415
The server can be configured to require manual approval for a
416
client before it is sent its secret. The delay to wait for such
417
approval and the default action (approve or deny) can be
418
configured both globally and per client; see <citerefentry>
332
checker program, and interval between checks can be configured
333
both globally and per client; see <citerefentry>
419
334
<refentrytitle>mandos-clients.conf</refentrytitle>
420
<manvolnum>5</manvolnum></citerefentry>. By default all clients
421
will be approved immediately without delay.
424
This can be used to deny a client its secret if not manually
425
approved within a specified time. It can also be used to make
426
the server delay before giving a client its secret, allowing
427
optional manual denying of this specific client.
335
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
receiving its password will also be treated as a successful
432
341
<refsect1 id="logging">
433
342
<title>LOGGING</title>
435
344
The server will send log message with various severity levels to
436
<filename class="devicefile">/dev/log</filename>. With the
345
<filename>/dev/log</filename>. With the
437
346
<option>--debug</option> option, it will log even more messages,
438
347
and also show them on the console.
442
<refsect1 id="persistent_state">
443
<title>PERSISTENT STATE</title>
445
Client settings, initially read from
446
<filename>clients.conf</filename>, are persistent across
447
restarts, and run-time changes will override settings in
448
<filename>clients.conf</filename>. However, if a setting is
449
<emphasis>changed</emphasis> (or a client added, or removed) in
450
<filename>clients.conf</filename>, this will take precedence.
454
351
<refsect1 id="dbus_interface">
455
352
<title>D-BUS INTERFACE</title>
457
354
The server will by default provide a D-Bus system bus interface.
458
355
This interface will only be accessible by the root user or a
459
Mandos-specific user, if such a user exists. For documentation
460
of the D-Bus API, see the file <filename>DBUS-API</filename>.
356
Mandos-specific user, if such a user exists.
521
<term><filename>/run/mandos.pid</filename></term>
524
The file containing the process id of the
525
<command>&COMMANDNAME;</command> process started last.
526
<emphasis >Note:</emphasis> If the <filename
527
class="directory">/run</filename> directory does not
528
exist, <filename>/var/run/mandos.pid</filename> will be
534
<term><filename class="devicefile">/dev/log</filename></term>
538
class="directory">/var/lib/mandos</filename></term>
541
Directory where persistent state will be saved. Change
542
this with the <option>--statedir</option> option. See
543
also the <option>--no-restore</option> option.
418
<term><filename>/var/run/mandos.pid</filename></term>
421
The file containing the process id of
422
<command>&COMMANDNAME;</command>.
574
453
backtrace. This could be considered a feature.
456
Currently, if a client is declared <quote>invalid</quote> due to
457
having timed out, the server does not record this fact onto
458
permanent storage. This has some security implications, see
459
<xref linkend="clients"/>.
462
There is currently no way of querying the server of the current
463
status of clients, other than analyzing its <systemitem
464
class="service">syslog</systemitem> output.
577
467
There is no fine-grained control over logging and debug output.
470
Debug mode is conflated with running in the foreground.
473
The console log messages do not show a time stamp.
580
476
This server does not check the expire time of clients’ OpenPGP
595
491
<informalexample>
597
493
Run the server in debug mode, read configuration files from
598
the <filename class="directory">~/mandos</filename> directory,
599
and use the Zeroconf service name <quote>Test</quote> to not
600
collide with any other official Mandos server on this host:
494
the <filename>~/mandos</filename> directory, and use the
495
Zeroconf service name <quote>Test</quote> to not collide with
496
any other official Mandos server on this host:
652
548
compromised if they are gone for too long.
551
If a client is compromised, its downtime should be duly noted
552
by the server which would therefore declare the client
553
invalid. But if the server was ever restarted, it would
554
re-read its client list from its configuration file and again
555
regard all clients therein as valid, and hence eligible to
556
receive their passwords. Therefore, be careful when
557
restarting servers if it is suspected that a client has, in
558
fact, been compromised by parties who may now be running a
559
fake Mandos client with the keys from the non-encrypted
560
initial <acronym>RAM</acronym> image of the client host. What
561
should be done in that case (if restarting the server program
562
really is necessary) is to stop the server program, edit the
563
configuration file to omit any suspect clients, and restart
655
567
For more details on client-side security, see
656
568
<citerefentry><refentrytitle>mandos-client</refentrytitle>
657
569
<manvolnum>8mandos</manvolnum></citerefentry>.
662
574
<refsect1 id="see_also">
663
575
<title>SEE ALSO</title>
665
<citerefentry><refentrytitle>intro</refentrytitle>
666
<manvolnum>8mandos</manvolnum></citerefentry>,
667
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
668
<manvolnum>5</manvolnum></citerefentry>,
669
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
670
<manvolnum>5</manvolnum></citerefentry>,
671
<citerefentry><refentrytitle>mandos-client</refentrytitle>
672
<manvolnum>8mandos</manvolnum></citerefentry>,
673
<citerefentry><refentrytitle>sh</refentrytitle>
674
<manvolnum>1</manvolnum></citerefentry>
578
<refentrytitle>mandos-clients.conf</refentrytitle>
579
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
580
<refentrytitle>mandos.conf</refentrytitle>
581
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
582
<refentrytitle>mandos-client</refentrytitle>
583
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
584
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>