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>
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>
110
<arg><option>--no-zeroconf</option></arg>
92
113
<command>&COMMANDNAME;</command>
111
132
<command>&COMMANDNAME;</command> is a server daemon which
112
133
handles incoming request for passwords for a pre-defined list of
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.
134
client host computers. For an introduction, see
135
<citerefentry><refentrytitle>intro</refentrytitle>
136
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
137
uses Zeroconf to announce itself on the local network, and uses
138
TLS to communicate securely with and to authenticate the
139
clients. The Mandos server uses IPv6 to allow Mandos clients to
140
use IPv6 link-local addresses, since the clients will probably
141
not have any other addresses configured (see <xref
142
linkend="overview"/>). Any authenticated client is then given
143
the stored pre-encrypted password for that specific client.
218
<term><option>--debuglevel
219
<replaceable>LEVEL</replaceable></option></term>
222
Set the debugging log level.
223
<replaceable>LEVEL</replaceable> is a string, one of
224
<quote><literal>CRITICAL</literal></quote>,
225
<quote><literal>ERROR</literal></quote>,
226
<quote><literal>WARNING</literal></quote>,
227
<quote><literal>INFO</literal></quote>, or
228
<quote><literal>DEBUG</literal></quote>, in order of
229
increasing verbosity. The default level is
230
<quote><literal>WARNING</literal></quote>.
195
236
<term><option>--priority <replaceable>
196
237
PRIORITY</replaceable></option></term>
198
<xi:include href="mandos-options.xml" xpointer="priority"/>
239
<xi:include href="mandos-options.xml"
240
xpointer="priority_compat"/>
288
<term><option>--no-ipv6</option></term>
290
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
295
<term><option>--no-restore</option></term>
297
<xi:include href="mandos-options.xml" xpointer="restore"/>
299
See also <xref linkend="persistent_state"/>.
305
<term><option>--statedir
306
<replaceable>DIRECTORY</replaceable></option></term>
308
<xi:include href="mandos-options.xml" xpointer="statedir"/>
313
<term><option>--socket
314
<replaceable>FD</replaceable></option></term>
316
<xi:include href="mandos-options.xml" xpointer="socket"/>
321
<term><option>--foreground</option></term>
323
<xi:include href="mandos-options.xml"
324
xpointer="foreground"/>
329
<term><option>--no-zeroconf</option></term>
331
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
318
409
The server will, by default, continually check that the clients
319
410
are still up. If a client has not been confirmed as being up
320
411
for some time, the client is assumed to be compromised and is no
321
longer eligible to receive the encrypted password. The timeout,
322
checker program, and interval between checks can be configured
323
both globally and per client; see <citerefentry>
412
longer eligible to receive the encrypted password. (Manual
413
intervention is required to re-enable a client.) The timeout,
414
extended timeout, checker program, and interval between checks
415
can be configured both globally and per client; see
416
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
417
<manvolnum>5</manvolnum></citerefentry>.
421
<refsect1 id="approval">
422
<title>APPROVAL</title>
424
The server can be configured to require manual approval for a
425
client before it is sent its secret. The delay to wait for such
426
approval and the default action (approve or deny) can be
427
configured both globally and per client; see <citerefentry>
324
428
<refentrytitle>mandos-clients.conf</refentrytitle>
325
<manvolnum>5</manvolnum></citerefentry>.
429
<manvolnum>5</manvolnum></citerefentry>. By default all clients
430
will be approved immediately without delay.
433
This can be used to deny a client its secret if not manually
434
approved within a specified time. It can also be used to make
435
the server delay before giving a client its secret, allowing
436
optional manual denying of this specific client.
329
441
<refsect1 id="logging">
330
442
<title>LOGGING</title>
332
444
The server will send log message with various severity levels to
333
<filename>/dev/log</filename>. With the
445
<filename class="devicefile">/dev/log</filename>. With the
334
446
<option>--debug</option> option, it will log even more messages,
335
447
and also show them on the console.
451
<refsect1 id="persistent_state">
452
<title>PERSISTENT STATE</title>
454
Client settings, initially read from
455
<filename>clients.conf</filename>, are persistent across
456
restarts, and run-time changes will override settings in
457
<filename>clients.conf</filename>. However, if a setting is
458
<emphasis>changed</emphasis> (or a client added, or removed) in
459
<filename>clients.conf</filename>, this will take precedence.
339
463
<refsect1 id="dbus_interface">
340
464
<title>D-BUS INTERFACE</title>
342
466
The server will by default provide a D-Bus system bus interface.
343
467
This interface will only be accessible by the root user or a
344
Mandos-specific user, if such a user exists.
468
Mandos-specific user, if such a user exists. For documentation
469
of the D-Bus API, see the file <filename>DBUS-API</filename>.
349
473
<refsect1 id="exit_status">
350
474
<title>EXIT STATUS</title>
406
<term><filename>/var/run/mandos.pid</filename></term>
409
The file containing the process id of
410
<command>&COMMANDNAME;</command>.
530
<term><filename>/run/mandos.pid</filename></term>
533
The file containing the process id of the
534
<command>&COMMANDNAME;</command> process started last.
535
<emphasis >Note:</emphasis> If the <filename
536
class="directory">/run</filename> directory does not
537
exist, <filename>/var/run/mandos.pid</filename> will be
543
<term><filename class="devicefile">/dev/log</filename></term>
547
class="directory">/var/lib/mandos</filename></term>
550
Directory where persistent state will be saved. Change
551
this with the <option>--statedir</option> option. See
552
also the <option>--no-restore</option> option.
441
583
backtrace. This could be considered a feature.
444
Currently, if a client is declared <quote>invalid</quote> due to
445
having timed out, the server does not record this fact onto
446
permanent storage. This has some security implications, see
447
<xref linkend="clients"/>.
450
There is currently no way of querying the server of the current
451
status of clients, other than analyzing its <systemitem
452
class="service">syslog</systemitem> output.
455
586
There is no fine-grained control over logging and debug output.
458
Debug mode is conflated with running in the foreground.
461
The console log messages does not show a time stamp.
464
589
This server does not check the expire time of clients’ OpenPGP
479
604
<informalexample>
481
606
Run the server in debug mode, read configuration files from
482
the <filename>~/mandos</filename> directory, and use the
483
Zeroconf service name <quote>Test</quote> to not collide with
484
any other official Mandos server on this host:
607
the <filename class="directory">~/mandos</filename> directory,
608
and use the Zeroconf service name <quote>Test</quote> to not
609
collide with any other official Mandos server on this host:
536
661
compromised if they are gone for too long.
539
If a client is compromised, its downtime should be duly noted
540
by the server which would therefore declare the client
541
invalid. But if the server was ever restarted, it would
542
re-read its client list from its configuration file and again
543
regard all clients therein as valid, and hence eligible to
544
receive their passwords. Therefore, be careful when
545
restarting servers if it is suspected that a client has, in
546
fact, been compromised by parties who may now be running a
547
fake Mandos client with the keys from the non-encrypted
548
initial <acronym>RAM</acronym> image of the client host. What
549
should be done in that case (if restarting the server program
550
really is necessary) is to stop the server program, edit the
551
configuration file to omit any suspect clients, and restart
555
664
For more details on client-side security, see
556
665
<citerefentry><refentrytitle>mandos-client</refentrytitle>
557
666
<manvolnum>8mandos</manvolnum></citerefentry>.
562
671
<refsect1 id="see_also">
563
672
<title>SEE ALSO</title>
566
<refentrytitle>mandos-clients.conf</refentrytitle>
567
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
568
<refentrytitle>mandos.conf</refentrytitle>
569
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
570
<refentrytitle>mandos-client</refentrytitle>
571
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
572
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
674
<citerefentry><refentrytitle>intro</refentrytitle>
675
<manvolnum>8mandos</manvolnum></citerefentry>,
676
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
677
<manvolnum>5</manvolnum></citerefentry>,
678
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
679
<manvolnum>5</manvolnum></citerefentry>,
680
<citerefentry><refentrytitle>mandos-client</refentrytitle>
681
<manvolnum>8mandos</manvolnum></citerefentry>,
682
<citerefentry><refentrytitle>sh</refentrytitle>
683
<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
