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>
39
35
<holder>Teddy Hogeborn</holder>
40
36
<holder>Björn Påhlsson</holder>
88
84
<replaceable>DIRECTORY</replaceable></option></arg>
90
86
<arg><option>--debug</option></arg>
92
<arg><option>--debuglevel
93
<replaceable>LEVEL</replaceable></option></arg>
95
<arg><option>--no-dbus</option></arg>
97
<arg><option>--no-ipv6</option></arg>
99
<arg><option>--no-restore</option></arg>
101
<arg><option>--statedir
102
<replaceable>DIRECTORY</replaceable></option></arg>
105
89
<command>&COMMANDNAME;</command>
124
108
<command>&COMMANDNAME;</command> is a server daemon which
125
109
handles incoming request for passwords for a pre-defined list of
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.
110
client host computers. The Mandos server uses Zeroconf to
111
announce itself on the local network, and uses TLS to
112
communicate securely with and to authenticate the clients. The
113
Mandos server uses IPv6 to allow Mandos clients to use IPv6
114
link-local addresses, since the clients will probably not have
115
any other addresses configured (see <xref linkend="overview"/>).
116
Any authenticated client is then given the stored pre-encrypted
117
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>.
228
192
<term><option>--priority <replaceable>
229
193
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"/>.
279
<term><option>--no-ipv6</option></term>
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"/>
376
305
The server will, by default, continually check that the clients
377
306
are still up. If a client has not been confirmed as being up
378
307
for some time, the client is assumed to be compromised and is no
379
longer eligible to receive the encrypted password. (Manual
380
intervention is required to re-enable a client.) The timeout,
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>
308
longer eligible to receive the encrypted password. The timeout,
309
checker program, and interval between checks can be configured
310
both globally and per client; see <citerefentry>
311
<refentrytitle>mandos-clients.conf</refentrytitle>
384
312
<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>
395
<refentrytitle>mandos-clients.conf</refentrytitle>
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.
408
316
<refsect1 id="logging">
409
317
<title>LOGGING</title>
411
319
The server will send log message with various severity levels to
412
<filename class="devicefile">/dev/log</filename>. With the
320
<filename>/dev/log</filename>. With the
413
321
<option>--debug</option> option, it will log even more messages,
414
322
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>.
440
326
<refsect1 id="exit_status">
441
327
<title>EXIT STATUS</title>
497
383
<term><filename>/var/run/mandos.pid</filename></term>
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.
386
The file containing the process id of
387
<command>&COMMANDNAME;</command>.
546
418
backtrace. This could be considered a feature.
421
Currently, if a client is declared <quote>invalid</quote> due to
422
having timed out, the server does not record this fact onto
423
permanent storage. This has some security implications, see
424
<xref linkend="clients"/>.
427
There is currently no way of querying the server of the current
428
status of clients, other than analyzing its <systemitem
429
class="service">syslog</systemitem> output.
549
432
There is no fine-grained control over logging and debug output.
552
435
Debug mode is conflated with running in the foreground.
438
The console log messages does not show a time stamp.
555
441
This server does not check the expire time of clients’ OpenPGP
570
456
<informalexample>
572
458
Run the server in debug mode, read configuration files from
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:
459
the <filename>~/mandos</filename> directory, and use the
460
Zeroconf service name <quote>Test</quote> to not collide with
461
any other official Mandos server on this host:
627
513
compromised if they are gone for too long.
516
If a client is compromised, its downtime should be duly noted
517
by the server which would therefore declare the client
518
invalid. But if the server was ever restarted, it would
519
re-read its client list from its configuration file and again
520
regard all clients therein as valid, and hence eligible to
521
receive their passwords. Therefore, be careful when
522
restarting servers if it is suspected that a client has, in
523
fact, been compromised by parties who may now be running a
524
fake Mandos client with the keys from the non-encrypted
525
initial <acronym>RAM</acronym> image of the client host. What
526
should be done in that case (if restarting the server program
527
really is necessary) is to stop the server program, edit the
528
configuration file to omit any suspect clients, and restart
630
532
For more details on client-side security, see
631
533
<citerefentry><refentrytitle>mandos-client</refentrytitle>
632
534
<manvolnum>8mandos</manvolnum></citerefentry>.
637
539
<refsect1 id="see_also">
638
540
<title>SEE ALSO</title>
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>
543
<refentrytitle>mandos-clients.conf</refentrytitle>
544
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
545
<refentrytitle>mandos.conf</refentrytitle>
546
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
547
<refentrytitle>mandos-client</refentrytitle>
548
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
549
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
added
removed
mandos.xml
