1
1
<?xml version="1.0" encoding="UTF-8"?>
2
2
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
3
3
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
4
<!ENTITY VERSION "1.0">
4
5
<!ENTITY COMMANDNAME "mandos">
5
<!ENTITY TIMESTAMP "2011-11-26">
6
<!ENTITY % common SYSTEM "common.ent">
6
<!ENTITY TIMESTAMP "2008-09-21">
10
9
<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
12
11
<title>Mandos Manual</title>
13
12
<!-- NWalsh’s docbook scripts use this to generate the footer: -->
14
13
<productname>Mandos</productname>
15
<productnumber>&version;</productnumber>
14
<productnumber>&VERSION;</productnumber>
16
15
<date>&TIMESTAMP;</date>
19
18
<firstname>Björn</firstname>
20
19
<surname>Påhlsson</surname>
22
<email>belorn@recompile.se</email>
21
<email>belorn@fukt.bsnet.se</email>
26
25
<firstname>Teddy</firstname>
27
26
<surname>Hogeborn</surname>
29
<email>teddy@recompile.se</email>
28
<email>teddy@fukt.bsnet.se</email>
38
34
<holder>Teddy Hogeborn</holder>
39
35
<holder>Björn Påhlsson</holder>
87
83
<replaceable>DIRECTORY</replaceable></option></arg>
89
85
<arg><option>--debug</option></arg>
91
<arg><option>--debuglevel
92
<replaceable>LEVEL</replaceable></option></arg>
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>
104
88
<command>&COMMANDNAME;</command>
123
107
<command>&COMMANDNAME;</command> is a server daemon which
124
108
handles incoming request for passwords for a pre-defined list of
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.
109
client host computers. The Mandos server uses Zeroconf to
110
announce itself on the local network, and uses TLS to
111
communicate securely with and to authenticate the clients. The
112
Mandos server uses IPv6 to allow Mandos clients to use IPv6
113
link-local addresses, since the clients will probably not have
114
any other addresses configured (see <xref linkend="overview"/>).
115
Any authenticated client is then given the stored pre-encrypted
116
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>.
227
191
<term><option>--priority <replaceable>
228
192
PRIORITY</replaceable></option></term>
268
<term><option>--no-dbus</option></term>
270
<xi:include href="mandos-options.xml" xpointer="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"/>
372
304
The server will, by default, continually check that the clients
373
305
are still up. If a client has not been confirmed as being up
374
306
for some time, the client is assumed to be compromised and is no
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>
307
longer eligible to receive the encrypted password. The timeout,
308
checker program, and interval between checks can be configured
309
both globally and per client; see <citerefentry>
393
310
<refentrytitle>mandos-clients.conf</refentrytitle>
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.
311
<manvolnum>5</manvolnum></citerefentry>.
406
315
<refsect1 id="logging">
416
<refsect1 id="dbus_interface">
417
<title>D-BUS INTERFACE</title>
419
The server will by default provide a D-Bus system bus interface.
420
This interface will only be accessible by the root user or a
421
Mandos-specific user, if such a user exists. For documentation
422
of the D-Bus API, see the file <filename>DBUS-API</filename>.
426
325
<refsect1 id="exit_status">
427
326
<title>EXIT STATUS</title>
483
382
<term><filename>/var/run/mandos.pid</filename></term>
486
The file containing the process id of the
487
<command>&COMMANDNAME;</command> process started last.
493
class="directory">/var/lib/mandos</filename></term>
496
Directory where persistent state will be saved. Change
497
this with the <option>--statedir</option> option. See
498
also the <option>--no-restore</option> option.
385
The file containing the process id of
386
<command>&COMMANDNAME;</command>.
529
417
backtrace. This could be considered a feature.
420
Currently, if a client is declared <quote>invalid</quote> due to
421
having timed out, the server does not record this fact onto
422
permanent storage. This has some security implications, see
423
<xref linkend="CLIENTS"/>.
426
There is currently no way of querying the server of the current
427
status of clients, other than analyzing its <systemitem
428
class="service">syslog</systemitem> output.
532
431
There is no fine-grained control over logging and debug output.
535
434
Debug mode is conflated with running in the foreground.
437
The console log messages does not show a time stamp.
538
440
This server does not check the expire time of clients’ OpenPGP
553
455
<informalexample>
555
457
Run the server in debug mode, read configuration files from
556
the <filename class="directory">~/mandos</filename> directory,
557
and use the Zeroconf service name <quote>Test</quote> to not
558
collide with any other official Mandos server on this host:
458
the <filename>~/mandos</filename> directory, and use the
459
Zeroconf service name <quote>Test</quote> to not collide with
460
any other official Mandos server on this host:
610
512
compromised if they are gone for too long.
515
If a client is compromised, its downtime should be duly noted
516
by the server which would therefore declare the client
517
invalid. But if the server was ever restarted, it would
518
re-read its client list from its configuration file and again
519
regard all clients therein as valid, and hence eligible to
520
receive their passwords. Therefore, be careful when
521
restarting servers if it is suspected that a client has, in
522
fact, been compromised by parties who may now be running a
523
fake Mandos client with the keys from the non-encrypted
524
initial <acronym>RAM</acronym> image of the client host. What
525
should be done in that case (if restarting the server program
526
really is necessary) is to stop the server program, edit the
527
configuration file to omit any suspect clients, and restart
613
531
For more details on client-side security, see
614
532
<citerefentry><refentrytitle>mandos-client</refentrytitle>
615
533
<manvolnum>8mandos</manvolnum></citerefentry>.
620
538
<refsect1 id="see_also">
621
539
<title>SEE ALSO</title>
623
<citerefentry><refentrytitle>intro</refentrytitle>
624
<manvolnum>8mandos</manvolnum></citerefentry>,
625
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
626
<manvolnum>5</manvolnum></citerefentry>,
627
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
628
<manvolnum>5</manvolnum></citerefentry>,
629
<citerefentry><refentrytitle>mandos-client</refentrytitle>
630
<manvolnum>8mandos</manvolnum></citerefentry>,
631
<citerefentry><refentrytitle>sh</refentrytitle>
632
<manvolnum>1</manvolnum></citerefentry>
542
<refentrytitle>mandos-clients.conf</refentrytitle>
543
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
544
<refentrytitle>mandos.conf</refentrytitle>
545
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
546
<refentrytitle>mandos-client</refentrytitle>
547
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
548
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>