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
35
<holder>Teddy Hogeborn</holder>
41
36
<holder>Björn Påhlsson</holder>
91
86
<arg><option>--debug</option></arg>
93
<arg><option>--debuglevel
94
<replaceable>LEVEL</replaceable></option></arg>
96
88
<arg><option>--no-dbus</option></arg>
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>
111
91
<command>&COMMANDNAME;</command>
130
110
<command>&COMMANDNAME;</command> is a server daemon which
131
111
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.
112
client host computers. The Mandos server uses Zeroconf to
113
announce itself on the local network, and uses TLS to
114
communicate securely with and to authenticate the clients. The
115
Mandos server uses IPv6 to allow Mandos clients to use IPv6
116
link-local addresses, since the clients will probably not have
117
any other addresses configured (see <xref linkend="overview"/>).
118
Any authenticated client is then given the stored pre-encrypted
119
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
194
<term><option>--priority <replaceable>
235
195
PRIORITY</replaceable></option></term>
285
<term><option>--no-ipv6</option></term>
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"/>
399
317
The server will, by default, continually check that the clients
400
318
are still up. If a client has not been confirmed as being up
401
319
for some time, the client is assumed to be compromised and is no
402
longer eligible to receive the encrypted password. (Manual
403
intervention is required to re-enable a client.) The timeout,
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>
320
longer eligible to receive the encrypted password. The timeout,
321
checker program, and interval between checks can be configured
322
both globally and per client; see <citerefentry>
323
<refentrytitle>mandos-clients.conf</refentrytitle>
407
324
<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>
418
<refentrytitle>mandos-clients.conf</refentrytitle>
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.
431
328
<refsect1 id="logging">
432
329
<title>LOGGING</title>
434
331
The server will send log message with various severity levels to
435
<filename class="devicefile">/dev/log</filename>. With the
332
<filename>/dev/log</filename>. With the
436
333
<option>--debug</option> option, it will log even more messages,
437
334
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.
453
338
<refsect1 id="dbus_interface">
454
339
<title>D-BUS INTERFACE</title>
456
341
The server will by default provide a D-Bus system bus interface.
457
342
This interface will only be accessible by the root user or a
458
Mandos-specific user, if such a user exists. For documentation
459
of the D-Bus API, see the file <filename>DBUS-API</filename>.
343
Mandos-specific user, if such a user exists.
463
348
<refsect1 id="exit_status">
464
349
<title>EXIT STATUS</title>
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.
405
<term><filename>/var/run/mandos.pid</filename></term>
408
The file containing the process id of
409
<command>&COMMANDNAME;</command>.
569
440
backtrace. This could be considered a feature.
443
Currently, if a client is declared <quote>invalid</quote> due to
444
having timed out, the server does not record this fact onto
445
permanent storage. This has some security implications, see
446
<xref linkend="clients"/>.
449
There is currently no way of querying the server of the current
450
status of clients, other than analyzing its <systemitem
451
class="service">syslog</systemitem> output.
572
454
There is no fine-grained control over logging and debug output.
457
Debug mode is conflated with running in the foreground.
460
The console log messages does not show a time stamp.
575
463
This server does not check the expire time of clients’ OpenPGP
590
478
<informalexample>
592
480
Run the server in debug mode, read configuration files from
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:
481
the <filename>~/mandos</filename> directory, and use the
482
Zeroconf service name <quote>Test</quote> to not collide with
483
any other official Mandos server on this host:
647
535
compromised if they are gone for too long.
538
If a client is compromised, its downtime should be duly noted
539
by the server which would therefore declare the client
540
invalid. But if the server was ever restarted, it would
541
re-read its client list from its configuration file and again
542
regard all clients therein as valid, and hence eligible to
543
receive their passwords. Therefore, be careful when
544
restarting servers if it is suspected that a client has, in
545
fact, been compromised by parties who may now be running a
546
fake Mandos client with the keys from the non-encrypted
547
initial <acronym>RAM</acronym> image of the client host. What
548
should be done in that case (if restarting the server program
549
really is necessary) is to stop the server program, edit the
550
configuration file to omit any suspect clients, and restart
650
554
For more details on client-side security, see
651
555
<citerefentry><refentrytitle>mandos-client</refentrytitle>
652
556
<manvolnum>8mandos</manvolnum></citerefentry>.
657
561
<refsect1 id="see_also">
658
562
<title>SEE ALSO</title>
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>
565
<refentrytitle>mandos-clients.conf</refentrytitle>
566
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
567
<refentrytitle>mandos.conf</refentrytitle>
568
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
569
<refentrytitle>mandos-client</refentrytitle>
570
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
571
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>