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>
35
38
<holder>Teddy Hogeborn</holder>
36
39
<holder>Björn Påhlsson</holder>
86
89
<arg><option>--debug</option></arg>
91
<arg><option>--debuglevel
92
<replaceable>LEVEL</replaceable></option></arg>
88
94
<arg><option>--no-dbus</option></arg>
96
<arg><option>--no-ipv6</option></arg>
98
<arg><option>--no-restore</option></arg>
100
<arg><option>--statedir
101
<replaceable>DIRECTORY</replaceable></option></arg>
91
104
<command>&COMMANDNAME;</command>
110
123
<command>&COMMANDNAME;</command> is a server daemon which
111
124
handles incoming request for passwords for a pre-defined list of
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.
125
client host computers. For an introduction, see
126
<citerefentry><refentrytitle>intro</refentrytitle>
127
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
128
uses Zeroconf to announce itself on the local network, and uses
129
TLS to communicate securely with and to authenticate the
130
clients. The Mandos server uses IPv6 to allow Mandos clients to
131
use IPv6 link-local addresses, since the clients will probably
132
not have any other addresses configured (see <xref
133
linkend="overview"/>). Any authenticated client is then given
134
the stored pre-encrypted password for that specific client.
209
<term><option>--debuglevel
210
<replaceable>LEVEL</replaceable></option></term>
213
Set the debugging log level.
214
<replaceable>LEVEL</replaceable> is a string, one of
215
<quote><literal>CRITICAL</literal></quote>,
216
<quote><literal>ERROR</literal></quote>,
217
<quote><literal>WARNING</literal></quote>,
218
<quote><literal>INFO</literal></quote>, or
219
<quote><literal>DEBUG</literal></quote>, in order of
220
increasing verbosity. The default level is
221
<quote><literal>WARNING</literal></quote>.
194
227
<term><option>--priority <replaceable>
195
228
PRIORITY</replaceable></option></term>
237
270
<xi:include href="mandos-options.xml" xpointer="dbus"/>
239
See also <xref linkend="dbus"/>.
272
See also <xref linkend="dbus_interface"/>.
278
<term><option>--no-ipv6</option></term>
280
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
285
<term><option>--no-restore</option></term>
287
<xi:include href="mandos-options.xml" xpointer="restore"/>
292
<term><option>--statedir
293
<replaceable>DIRECTORY</replaceable></option></term>
295
<xi:include href="mandos-options.xml" xpointer="statedir"/>
316
372
The server will, by default, continually check that the clients
317
373
are still up. If a client has not been confirmed as being up
318
374
for some time, the client is assumed to be compromised and is no
319
longer eligible to receive the encrypted password. The timeout,
320
checker program, and interval between checks can be configured
321
both globally and per client; see <citerefentry>
375
longer eligible to receive the encrypted password. (Manual
376
intervention is required to re-enable a client.) The timeout,
377
extended timeout, checker program, and interval between checks
378
can be configured both globally and per client; see
379
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
380
<manvolnum>5</manvolnum></citerefentry>. A client successfully
381
receiving its password will also be treated as a successful
386
<refsect1 id="approval">
387
<title>APPROVAL</title>
389
The server can be configured to require manual approval for a
390
client before it is sent its secret. The delay to wait for such
391
approval and the default action (approve or deny) can be
392
configured both globally and per client; see <citerefentry>
322
393
<refentrytitle>mandos-clients.conf</refentrytitle>
323
<manvolnum>5</manvolnum></citerefentry>.
394
<manvolnum>5</manvolnum></citerefentry>. By default all clients
395
will be approved immediately without delay.
398
This can be used to deny a client its secret if not manually
399
approved within a specified time. It can also be used to make
400
the server delay before giving a client its secret, allowing
401
optional manual denying of this specific client.
327
406
<refsect1 id="logging">
328
407
<title>LOGGING</title>
330
409
The server will send log message with various severity levels to
331
<filename>/dev/log</filename>. With the
410
<filename class="devicefile">/dev/log</filename>. With the
332
411
<option>--debug</option> option, it will log even more messages,
333
412
and also show them on the console.
416
<refsect1 id="dbus_interface">
338
417
<title>D-BUS INTERFACE</title>
340
419
The server will by default provide a D-Bus system bus interface.
341
420
This interface will only be accessible by the root user or a
342
Mandos-specific user, if such a user exists.
421
Mandos-specific user, if such a user exists. For documentation
422
of the D-Bus API, see the file <filename>DBUS-API</filename>.
347
426
<refsect1 id="exit_status">
348
427
<title>EXIT STATUS</title>
404
483
<term><filename>/var/run/mandos.pid</filename></term>
407
The file containing the process id of
408
<command>&COMMANDNAME;</command>.
486
The file containing the process id of the
487
<command>&COMMANDNAME;</command> process started last.
492
<term><filename class="devicefile">/dev/log</filename></term>
496
class="directory">/var/lib/mandos</filename></term>
499
Directory where persistent state will be saved. Change
500
this with the <option>--statedir</option> option. See
501
also the <option>--no-restore</option> option.
439
532
backtrace. This could be considered a feature.
442
Currently, if a client is declared <quote>invalid</quote> due to
443
having timed out, the server does not record this fact onto
444
permanent storage. This has some security implications, see
445
<xref linkend="clients"/>.
448
There is currently no way of querying the server of the current
449
status of clients, other than analyzing its <systemitem
450
class="service">syslog</systemitem> output.
453
535
There is no fine-grained control over logging and debug output.
456
538
Debug mode is conflated with running in the foreground.
459
The console log messages does not show a time stamp.
462
541
This server does not check the expire time of clients’ OpenPGP
477
556
<informalexample>
479
558
Run the server in debug mode, read configuration files from
480
the <filename>~/mandos</filename> directory, and use the
481
Zeroconf service name <quote>Test</quote> to not collide with
482
any other official Mandos server on this host:
559
the <filename class="directory">~/mandos</filename> directory,
560
and use the Zeroconf service name <quote>Test</quote> to not
561
collide with any other official Mandos server on this host:
534
613
compromised if they are gone for too long.
537
If a client is compromised, its downtime should be duly noted
538
by the server which would therefore declare the client
539
invalid. But if the server was ever restarted, it would
540
re-read its client list from its configuration file and again
541
regard all clients therein as valid, and hence eligible to
542
receive their passwords. Therefore, be careful when
543
restarting servers if it is suspected that a client has, in
544
fact, been compromised by parties who may now be running a
545
fake Mandos client with the keys from the non-encrypted
546
initial <acronym>RAM</acronym> image of the client host. What
547
should be done in that case (if restarting the server program
548
really is necessary) is to stop the server program, edit the
549
configuration file to omit any suspect clients, and restart
553
616
For more details on client-side security, see
554
617
<citerefentry><refentrytitle>mandos-client</refentrytitle>
555
618
<manvolnum>8mandos</manvolnum></citerefentry>.
560
623
<refsect1 id="see_also">
561
624
<title>SEE ALSO</title>
564
<refentrytitle>mandos-clients.conf</refentrytitle>
565
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
566
<refentrytitle>mandos.conf</refentrytitle>
567
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
568
<refentrytitle>mandos-client</refentrytitle>
569
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
570
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
626
<citerefentry><refentrytitle>intro</refentrytitle>
627
<manvolnum>8mandos</manvolnum></citerefentry>,
628
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
629
<manvolnum>5</manvolnum></citerefentry>,
630
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
631
<manvolnum>5</manvolnum></citerefentry>,
632
<citerefentry><refentrytitle>mandos-client</refentrytitle>
633
<manvolnum>8mandos</manvolnum></citerefentry>,
634
<citerefentry><refentrytitle>sh</refentrytitle>
635
<manvolnum>1</manvolnum></citerefentry>