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
44
<holder>Teddy Hogeborn</holder>
37
45
<holder>Björn Påhlsson</holder>
87
95
<arg><option>--debug</option></arg>
97
<arg><option>--debuglevel
98
<replaceable>LEVEL</replaceable></option></arg>
89
100
<arg><option>--no-dbus</option></arg>
91
102
<arg><option>--no-ipv6</option></arg>
104
<arg><option>--no-restore</option></arg>
106
<arg><option>--statedir
107
<replaceable>DIRECTORY</replaceable></option></arg>
109
<arg><option>--socket
110
<replaceable>FD</replaceable></option></arg>
112
<arg><option>--foreground</option></arg>
114
<arg><option>--no-zeroconf</option></arg>
94
117
<command>&COMMANDNAME;</command>
113
136
<command>&COMMANDNAME;</command> is a server daemon which
114
137
handles incoming request for passwords for a pre-defined list of
115
client host computers. The Mandos server uses Zeroconf to
116
announce itself on the local network, and uses TLS to
117
communicate securely with and to authenticate the clients. The
118
Mandos server uses IPv6 to allow Mandos clients to use IPv6
119
link-local addresses, since the clients will probably not have
120
any other addresses configured (see <xref linkend="overview"/>).
121
Any authenticated client is then given the stored pre-encrypted
122
password for that specific client.
138
client host computers. For an introduction, see
139
<citerefentry><refentrytitle>intro</refentrytitle>
140
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
141
uses Zeroconf to announce itself on the local network, and uses
142
TLS to communicate securely with and to authenticate the
143
clients. The Mandos server uses IPv6 to allow Mandos clients to
144
use IPv6 link-local addresses, since the clients will probably
145
not have any other addresses configured (see <xref
146
linkend="overview"/>). Any authenticated client is then given
147
the stored pre-encrypted password for that specific client.
222
<term><option>--debuglevel
223
<replaceable>LEVEL</replaceable></option></term>
226
Set the debugging log level.
227
<replaceable>LEVEL</replaceable> is a string, one of
228
<quote><literal>CRITICAL</literal></quote>,
229
<quote><literal>ERROR</literal></quote>,
230
<quote><literal>WARNING</literal></quote>,
231
<quote><literal>INFO</literal></quote>, or
232
<quote><literal>DEBUG</literal></quote>, in order of
233
increasing verbosity. The default level is
234
<quote><literal>WARNING</literal></quote>.
197
240
<term><option>--priority <replaceable>
198
241
PRIORITY</replaceable></option></term>
250
293
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
298
<term><option>--no-restore</option></term>
300
<xi:include href="mandos-options.xml" xpointer="restore"/>
302
See also <xref linkend="persistent_state"/>.
308
<term><option>--statedir
309
<replaceable>DIRECTORY</replaceable></option></term>
311
<xi:include href="mandos-options.xml" xpointer="statedir"/>
316
<term><option>--socket
317
<replaceable>FD</replaceable></option></term>
319
<xi:include href="mandos-options.xml" xpointer="socket"/>
324
<term><option>--foreground</option></term>
326
<xi:include href="mandos-options.xml"
327
xpointer="foreground"/>
332
<term><option>--no-zeroconf</option></term>
334
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
327
412
The server will, by default, continually check that the clients
328
413
are still up. If a client has not been confirmed as being up
329
414
for some time, the client is assumed to be compromised and is no
330
longer eligible to receive the encrypted password. The timeout,
331
checker program, and interval between checks can be configured
332
both globally and per client; see <citerefentry>
415
longer eligible to receive the encrypted password. (Manual
416
intervention is required to re-enable a client.) The timeout,
417
extended timeout, checker program, and interval between checks
418
can be configured both globally and per client; see
419
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
420
<manvolnum>5</manvolnum></citerefentry>.
424
<refsect1 id="approval">
425
<title>APPROVAL</title>
427
The server can be configured to require manual approval for a
428
client before it is sent its secret. The delay to wait for such
429
approval and the default action (approve or deny) can be
430
configured both globally and per client; see <citerefentry>
333
431
<refentrytitle>mandos-clients.conf</refentrytitle>
334
<manvolnum>5</manvolnum></citerefentry>.
432
<manvolnum>5</manvolnum></citerefentry>. By default all clients
433
will be approved immediately without delay.
436
This can be used to deny a client its secret if not manually
437
approved within a specified time. It can also be used to make
438
the server delay before giving a client its secret, allowing
439
optional manual denying of this specific client.
338
444
<refsect1 id="logging">
339
445
<title>LOGGING</title>
341
447
The server will send log message with various severity levels to
342
<filename>/dev/log</filename>. With the
448
<filename class="devicefile">/dev/log</filename>. With the
343
449
<option>--debug</option> option, it will log even more messages,
344
450
and also show them on the console.
454
<refsect1 id="persistent_state">
455
<title>PERSISTENT STATE</title>
457
Client settings, initially read from
458
<filename>clients.conf</filename>, are persistent across
459
restarts, and run-time changes will override settings in
460
<filename>clients.conf</filename>. However, if a setting is
461
<emphasis>changed</emphasis> (or a client added, or removed) in
462
<filename>clients.conf</filename>, this will take precedence.
348
466
<refsect1 id="dbus_interface">
349
467
<title>D-BUS INTERFACE</title>
351
469
The server will by default provide a D-Bus system bus interface.
352
470
This interface will only be accessible by the root user or a
353
Mandos-specific user, if such a user exists.
471
Mandos-specific user, if such a user exists. For documentation
472
of the D-Bus API, see the file <filename>DBUS-API</filename>.
415
<term><filename>/var/run/mandos.pid</filename></term>
418
The file containing the process id of
419
<command>&COMMANDNAME;</command>.
424
<term><filename>/dev/log</filename></term>
533
<term><filename>/run/mandos.pid</filename></term>
536
The file containing the process id of the
537
<command>&COMMANDNAME;</command> process started last.
538
<emphasis >Note:</emphasis> If the <filename
539
class="directory">/run</filename> directory does not
540
exist, <filename>/var/run/mandos.pid</filename> will be
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.
557
<term><filename class="devicefile">/dev/log</filename></term>
427
560
The Unix domain socket to where local syslog messages are
450
583
backtrace. This could be considered a feature.
453
Currently, if a client is declared <quote>invalid</quote> due to
454
having timed out, the server does not record this fact onto
455
permanent storage. This has some security implications, see
456
<xref linkend="clients"/>.
459
There is currently no way of querying the server of the current
460
status of clients, other than analyzing its <systemitem
461
class="service">syslog</systemitem> output.
464
586
There is no fine-grained control over logging and debug output.
467
Debug mode is conflated with running in the foreground.
470
The console log messages do not show a time stamp.
473
589
This server does not check the expire time of clients’ OpenPGP
592
<xi:include href="bugs.xml"/>
478
595
<refsect1 id="example">
488
605
<informalexample>
490
607
Run the server in debug mode, read configuration files from
491
the <filename>~/mandos</filename> directory, and use the
492
Zeroconf service name <quote>Test</quote> to not collide with
493
any other official Mandos server on this host:
608
the <filename class="directory">~/mandos</filename> directory,
609
and use the Zeroconf service name <quote>Test</quote> to not
610
collide with any other official Mandos server on this host:
545
662
compromised if they are gone for too long.
548
If a client is compromised, its downtime should be duly noted
549
by the server which would therefore declare the client
550
invalid. But if the server was ever restarted, it would
551
re-read its client list from its configuration file and again
552
regard all clients therein as valid, and hence eligible to
553
receive their passwords. Therefore, be careful when
554
restarting servers if it is suspected that a client has, in
555
fact, been compromised by parties who may now be running a
556
fake Mandos client with the keys from the non-encrypted
557
initial <acronym>RAM</acronym> image of the client host. What
558
should be done in that case (if restarting the server program
559
really is necessary) is to stop the server program, edit the
560
configuration file to omit any suspect clients, and restart
564
665
For more details on client-side security, see
565
666
<citerefentry><refentrytitle>mandos-client</refentrytitle>
566
667
<manvolnum>8mandos</manvolnum></citerefentry>.
571
672
<refsect1 id="see_also">
572
673
<title>SEE ALSO</title>
575
<refentrytitle>mandos-clients.conf</refentrytitle>
576
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
577
<refentrytitle>mandos.conf</refentrytitle>
578
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
579
<refentrytitle>mandos-client</refentrytitle>
580
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
581
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
675
<citerefentry><refentrytitle>intro</refentrytitle>
676
<manvolnum>8mandos</manvolnum></citerefentry>,
677
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
678
<manvolnum>5</manvolnum></citerefentry>,
679
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
680
<manvolnum>5</manvolnum></citerefentry>,
681
<citerefentry><refentrytitle>mandos-client</refentrytitle>
682
<manvolnum>8mandos</manvolnum></citerefentry>,
683
<citerefentry><refentrytitle>sh</refentrytitle>
684
<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
