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
<arg><option>--no-dbus</option></arg>
98
89
<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
92
<command>&COMMANDNAME;</command>
130
111
<command>&COMMANDNAME;</command> is a server daemon which
131
112
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.
113
client host computers. The Mandos server uses Zeroconf to
114
announce itself on the local network, and uses TLS to
115
communicate securely with and to authenticate the clients. The
116
Mandos server uses IPv6 to allow Mandos clients to use IPv6
117
link-local addresses, since the clients will probably not have
118
any other addresses configured (see <xref linkend="overview"/>).
119
Any authenticated client is then given the stored pre-encrypted
120
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
195
<term><option>--priority <replaceable>
235
196
PRIORITY</replaceable></option></term>
237
<xi:include href="mandos-options.xml"
238
xpointer="priority_compat"/>
198
<xi:include href="mandos-options.xml" xpointer="priority"/>
276
<term><option>--no-dbus</option></term>
278
<xi:include href="mandos-options.xml" xpointer="dbus"/>
280
See also <xref linkend="dbus_interface"/>.
286
236
<term><option>--no-ipv6</option></term>
288
238
<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"/>
400
315
The server will, by default, continually check that the clients
401
316
are still up. If a client has not been confirmed as being up
402
317
for some time, the client is assumed to be compromised and is no
403
longer eligible to receive the encrypted password. (Manual
404
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>
318
longer eligible to receive the encrypted password. The timeout,
319
checker program, and interval between checks can be configured
320
both globally and per client; see <citerefentry>
321
<refentrytitle>mandos-clients.conf</refentrytitle>
408
322
<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>
419
<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.
432
326
<refsect1 id="logging">
433
327
<title>LOGGING</title>
435
329
The server will send log message with various severity levels to
436
<filename class="devicefile">/dev/log</filename>. With the
330
<filename>/dev/log</filename>. With the
437
331
<option>--debug</option> option, it will log even more messages,
438
332
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
<refsect1 id="dbus_interface">
455
<title>D-BUS INTERFACE</title>
457
The server will by default provide a D-Bus system bus interface.
458
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>.
464
336
<refsect1 id="exit_status">
465
337
<title>EXIT STATUS</title>
521
<term><filename>/run/mandos.pid</filename></term>
524
The file containing the process id of the
525
<command>&COMMANDNAME;</command> process started last.
530
<term><filename class="devicefile">/dev/log</filename></term>
534
class="directory">/var/lib/mandos</filename></term>
537
Directory where persistent state will be saved. Change
538
this with the <option>--statedir</option> option. See
539
also the <option>--no-restore</option> option.
393
<term><filename>/var/run/mandos.pid</filename></term>
396
The file containing the process id of
397
<command>&COMMANDNAME;</command>.
570
428
backtrace. This could be considered a feature.
431
Currently, if a client is declared <quote>invalid</quote> due to
432
having timed out, the server does not record this fact onto
433
permanent storage. This has some security implications, see
434
<xref linkend="clients"/>.
437
There is currently no way of querying the server of the current
438
status of clients, other than analyzing its <systemitem
439
class="service">syslog</systemitem> output.
573
442
There is no fine-grained control over logging and debug output.
445
Debug mode is conflated with running in the foreground.
448
The console log messages do not show a time stamp.
576
451
This server does not check the expire time of clients’ OpenPGP
591
466
<informalexample>
593
468
Run the server in debug mode, read configuration files from
594
the <filename class="directory">~/mandos</filename> directory,
595
and use the Zeroconf service name <quote>Test</quote> to not
596
collide with any other official Mandos server on this host:
469
the <filename>~/mandos</filename> directory, and use the
470
Zeroconf service name <quote>Test</quote> to not collide with
471
any other official Mandos server on this host:
648
523
compromised if they are gone for too long.
526
If a client is compromised, its downtime should be duly noted
527
by the server which would therefore declare the client
528
invalid. But if the server was ever restarted, it would
529
re-read its client list from its configuration file and again
530
regard all clients therein as valid, and hence eligible to
531
receive their passwords. Therefore, be careful when
532
restarting servers if it is suspected that a client has, in
533
fact, been compromised by parties who may now be running a
534
fake Mandos client with the keys from the non-encrypted
535
initial <acronym>RAM</acronym> image of the client host. What
536
should be done in that case (if restarting the server program
537
really is necessary) is to stop the server program, edit the
538
configuration file to omit any suspect clients, and restart
651
542
For more details on client-side security, see
652
543
<citerefentry><refentrytitle>mandos-client</refentrytitle>
653
544
<manvolnum>8mandos</manvolnum></citerefentry>.
658
549
<refsect1 id="see_also">
659
550
<title>SEE ALSO</title>
661
<citerefentry><refentrytitle>intro</refentrytitle>
662
<manvolnum>8mandos</manvolnum></citerefentry>,
663
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
664
<manvolnum>5</manvolnum></citerefentry>,
665
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
666
<manvolnum>5</manvolnum></citerefentry>,
667
<citerefentry><refentrytitle>mandos-client</refentrytitle>
668
<manvolnum>8mandos</manvolnum></citerefentry>,
669
<citerefentry><refentrytitle>sh</refentrytitle>
670
<manvolnum>1</manvolnum></citerefentry>
553
<refentrytitle>mandos-clients.conf</refentrytitle>
554
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
555
<refentrytitle>mandos.conf</refentrytitle>
556
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
557
<refentrytitle>mandos-client</refentrytitle>
558
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
559
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>