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
39
<holder>Teddy Hogeborn</holder>
37
40
<holder>Björn Påhlsson</holder>
87
90
<arg><option>--debug</option></arg>
92
<arg><option>--debuglevel
93
<replaceable>LEVEL</replaceable></option></arg>
95
<arg><option>--no-dbus</option></arg>
89
97
<arg><option>--no-ipv6</option></arg>
99
<arg><option>--no-restore</option></arg>
101
<arg><option>--statedir
102
<replaceable>DIRECTORY</replaceable></option></arg>
92
105
<command>&COMMANDNAME;</command>
111
124
<command>&COMMANDNAME;</command> is a server daemon which
112
125
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.
126
client host computers. For an introduction, see
127
<citerefentry><refentrytitle>intro</refentrytitle>
128
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
129
uses Zeroconf to announce itself on the local network, and uses
130
TLS to communicate securely with and to authenticate the
131
clients. The Mandos server uses IPv6 to allow Mandos clients to
132
use IPv6 link-local addresses, since the clients will probably
133
not have any other addresses configured (see <xref
134
linkend="overview"/>). Any authenticated client is then given
135
the stored pre-encrypted password for that specific client.
210
<term><option>--debuglevel
211
<replaceable>LEVEL</replaceable></option></term>
214
Set the debugging log level.
215
<replaceable>LEVEL</replaceable> is a string, one of
216
<quote><literal>CRITICAL</literal></quote>,
217
<quote><literal>ERROR</literal></quote>,
218
<quote><literal>WARNING</literal></quote>,
219
<quote><literal>INFO</literal></quote>, or
220
<quote><literal>DEBUG</literal></quote>, in order of
221
increasing verbosity. The default level is
222
<quote><literal>WARNING</literal></quote>.
195
228
<term><option>--priority <replaceable>
196
229
PRIORITY</replaceable></option></term>
269
<term><option>--no-dbus</option></term>
271
<xi:include href="mandos-options.xml" xpointer="dbus"/>
273
See also <xref linkend="dbus_interface"/>.
236
279
<term><option>--no-ipv6</option></term>
238
281
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
286
<term><option>--no-restore</option></term>
288
<xi:include href="mandos-options.xml" xpointer="restore"/>
290
See also <xref linkend="persistent_state"/>.
296
<term><option>--statedir
297
<replaceable>DIRECTORY</replaceable></option></term>
299
<xi:include href="mandos-options.xml" xpointer="statedir"/>
317
378
for some time, the client is assumed to be compromised and is no
318
379
longer eligible to receive the encrypted password. (Manual
319
380
intervention is required to re-enable a client.) The timeout,
320
checker program, and interval between checks can be configured
321
both globally and per client; see <citerefentry>
381
extended timeout, checker program, and interval between checks
382
can be configured both globally and per client; see
383
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
384
<manvolnum>5</manvolnum></citerefentry>.
388
<refsect1 id="approval">
389
<title>APPROVAL</title>
391
The server can be configured to require manual approval for a
392
client before it is sent its secret. The delay to wait for such
393
approval and the default action (approve or deny) can be
394
configured both globally and per client; see <citerefentry>
322
395
<refentrytitle>mandos-clients.conf</refentrytitle>
323
<manvolnum>5</manvolnum></citerefentry>. A client successfully
324
receiving its password will also be treated as a successful
396
<manvolnum>5</manvolnum></citerefentry>. By default all clients
397
will be approved immediately without delay.
400
This can be used to deny a client its secret if not manually
401
approved within a specified time. It can also be used to make
402
the server delay before giving a client its secret, allowing
403
optional manual denying of this specific client.
329
408
<refsect1 id="logging">
330
409
<title>LOGGING</title>
332
411
The server will send log message with various severity levels to
333
<filename>/dev/log</filename>. With the
412
<filename class="devicefile">/dev/log</filename>. With the
334
413
<option>--debug</option> option, it will log even more messages,
335
414
and also show them on the console.
418
<refsect1 id="persistent_state">
419
<title>PERSISTENT STATE</title>
421
Client settings, initially read from
422
<filename>clients.conf</filename>, are persistent across
423
restarts, and run-time changes will override settings in
424
<filename>clients.conf</filename>. However, if a setting is
425
<emphasis>changed</emphasis> (or a client added, or removed) in
426
<filename>clients.conf</filename>, this will take precedence.
430
<refsect1 id="dbus_interface">
431
<title>D-BUS INTERFACE</title>
433
The server will by default provide a D-Bus system bus interface.
434
This interface will only be accessible by the root user or a
435
Mandos-specific user, if such a user exists. For documentation
436
of the D-Bus API, see the file <filename>DBUS-API</filename>.
339
440
<refsect1 id="exit_status">
340
441
<title>EXIT STATUS</title>
396
497
<term><filename>/var/run/mandos.pid</filename></term>
399
The file containing the process id of
400
<command>&COMMANDNAME;</command>.
500
The file containing the process id of the
501
<command>&COMMANDNAME;</command> process started last.
506
<term><filename class="devicefile">/dev/log</filename></term>
510
class="directory">/var/lib/mandos</filename></term>
513
Directory where persistent state will be saved. Change
514
this with the <option>--statedir</option> option. See
515
also the <option>--no-restore</option> option.
431
546
backtrace. This could be considered a feature.
434
Currently, if a client is declared <quote>invalid</quote> due to
435
having timed out, the server does not record this fact onto
436
permanent storage. This has some security implications, see
437
<xref linkend="clients"/>.
440
There is currently no way of querying the server of the current
441
status of clients, other than analyzing its <systemitem
442
class="service">syslog</systemitem> output.
445
549
There is no fine-grained control over logging and debug output.
448
552
Debug mode is conflated with running in the foreground.
451
The console log messages do not show a time stamp.
454
555
This server does not check the expire time of clients’ OpenPGP
469
570
<informalexample>
471
572
Run the server in debug mode, read configuration files from
472
the <filename>~/mandos</filename> directory, and use the
473
Zeroconf service name <quote>Test</quote> to not collide with
474
any other official Mandos server on this host:
573
the <filename class="directory">~/mandos</filename> directory,
574
and use the Zeroconf service name <quote>Test</quote> to not
575
collide with any other official Mandos server on this host:
526
627
compromised if they are gone for too long.
529
If a client is compromised, its downtime should be duly noted
530
by the server which would therefore declare the client
531
invalid. But if the server was ever restarted, it would
532
re-read its client list from its configuration file and again
533
regard all clients therein as valid, and hence eligible to
534
receive their passwords. Therefore, be careful when
535
restarting servers if it is suspected that a client has, in
536
fact, been compromised by parties who may now be running a
537
fake Mandos client with the keys from the non-encrypted
538
initial <acronym>RAM</acronym> image of the client host. What
539
should be done in that case (if restarting the server program
540
really is necessary) is to stop the server program, edit the
541
configuration file to omit any suspect clients, and restart
545
630
For more details on client-side security, see
546
631
<citerefentry><refentrytitle>mandos-client</refentrytitle>
547
632
<manvolnum>8mandos</manvolnum></citerefentry>.
552
637
<refsect1 id="see_also">
553
638
<title>SEE ALSO</title>
556
<refentrytitle>mandos-clients.conf</refentrytitle>
557
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
558
<refentrytitle>mandos.conf</refentrytitle>
559
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
560
<refentrytitle>mandos-client</refentrytitle>
561
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
562
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
640
<citerefentry><refentrytitle>intro</refentrytitle>
641
<manvolnum>8mandos</manvolnum></citerefentry>,
642
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
643
<manvolnum>5</manvolnum></citerefentry>,
644
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
645
<manvolnum>5</manvolnum></citerefentry>,
646
<citerefentry><refentrytitle>mandos-client</refentrytitle>
647
<manvolnum>8mandos</manvolnum></citerefentry>,
648
<citerefentry><refentrytitle>sh</refentrytitle>
649
<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
