To get this branch, use:
bzr branch
http://bzr.recompile.se/loggerhead/mandos/trunk
« back to all changes in this revision
Viewing changes to mandos.xml
- browse files at revision 1253
- compare with another revision
- download diff
- download tarball
- view history from revision 1253
- Committer: Teddy Hogeborn
- Date: 2022-04-24 11:45:13 UTC
- Revision ID: teddy@recompile.se-20220424114513-0rvlunnjhgs3deus
mandos-monitor: Update boilerplate code
* mandos-monitor: Show warnings by default.
* mandos-monitor: Show warnings by default.
- files added:
- DBUS-API
- debian/source
- debian/tests
- debian/upstream
- dracut-module
- network-hooks.d
- plugin-helpers
- files removed:
- initramfs-tools-hook-conf
- files modified:
- .bzrignore
added
removed
mandos.xml
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
4
<!ENTITY COMMANDNAME "mandos">
5
<!ENTITY TIMESTAMP "2009-09-17">
5
<!ENTITY TIMESTAMP "2022-04-24">
6
6
<!ENTITY % common SYSTEM "common.ent">
7
7
%common;
8
8
]>
19
19
<firstname>Björn</firstname>
20
20
<surname>Påhlsson</surname>
21
21
<address>
22
<email>belorn@fukt.bsnet.se</email>
22
<email>belorn@recompile.se</email>
23
23
</address>
24
24
</author>
25
25
<author>
26
26
<firstname>Teddy</firstname>
27
27
<surname>Hogeborn</surname>
28
28
<address>
29
<email>teddy@fukt.bsnet.se</email>
29
<email>teddy@recompile.se</email>
30
30
</address>
31
31
</author>
32
32
</authorgroup>
33
33
<copyright>
34
34
<year>2008</year>
35
35
<year>2009</year>
36
<year>2010</year>
37
<year>2011</year>
38
<year>2012</year>
39
<year>2013</year>
40
<year>2014</year>
41
<year>2015</year>
42
<year>2016</year>
43
<year>2017</year>
44
<year>2018</year>
45
<year>2019</year>
36
46
<holder>Teddy Hogeborn</holder>
37
47
<holder>Björn Påhlsson</holder>
38
48
</copyright>
86
96
<sbr/>
87
97
<arg><option>--debug</option></arg>
88
98
<sbr/>
99
<arg><option>--debuglevel
100
<replaceable>LEVEL</replaceable></option></arg>
101
<sbr/>
89
102
<arg><option>--no-dbus</option></arg>
90
103
<sbr/>
91
104
<arg><option>--no-ipv6</option></arg>
105
<sbr/>
106
<arg><option>--no-restore</option></arg>
107
<sbr/>
108
<arg><option>--statedir
109
<replaceable>DIRECTORY</replaceable></option></arg>
110
<sbr/>
111
<arg><option>--socket
112
<replaceable>FD</replaceable></option></arg>
113
<sbr/>
114
<arg><option>--foreground</option></arg>
115
<sbr/>
116
<arg><option>--no-zeroconf</option></arg>
92
117
</cmdsynopsis>
93
118
<cmdsynopsis>
94
119
<command>&COMMANDNAME;</command>
111
136
<title>DESCRIPTION</title>
112
137
<para>
113
138
<command>&COMMANDNAME;</command> is a server daemon which
114
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.
139
handles incoming requests for passwords for a pre-defined list
140
of client host computers. For an introduction, see
141
<citerefentry><refentrytitle>intro</refentrytitle>
142
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
143
uses Zeroconf to announce itself on the local network, and uses
144
TLS to communicate securely with and to authenticate the
145
clients. The Mandos server uses IPv6 to allow Mandos clients to
146
use IPv6 link-local addresses, since the clients will probably
147
not have any other addresses configured (see <xref
148
linkend="overview"/>). Any authenticated client is then given
149
the stored pre-encrypted password for that specific client.
123
150
</para>
124
151
</refsect1>
125
152
194
221
</varlistentry>
195
222
196
223
<varlistentry>
224
<term><option>--debuglevel
225
<replaceable>LEVEL</replaceable></option></term>
226
<listitem>
227
<para>
228
Set the debugging log level.
229
<replaceable>LEVEL</replaceable> is a string, one of
230
<quote><literal>CRITICAL</literal></quote>,
231
<quote><literal>ERROR</literal></quote>,
232
<quote><literal>WARNING</literal></quote>,
233
<quote><literal>INFO</literal></quote>, or
234
<quote><literal>DEBUG</literal></quote>, in order of
235
increasing verbosity. The default level is
236
<quote><literal>WARNING</literal></quote>.
237
</para>
238
</listitem>
239
</varlistentry>
240
241
<varlistentry>
197
242
<term><option>--priority <replaceable>
198
243
PRIORITY</replaceable></option></term>
199
244
<listitem>
250
295
<xi:include href="mandos-options.xml" xpointer="ipv6"/>
251
296
</listitem>
252
297
</varlistentry>
298
299
<varlistentry>
300
<term><option>--no-restore</option></term>
301
<listitem>
302
<xi:include href="mandos-options.xml" xpointer="restore"/>
303
<para>
304
See also <xref linkend="persistent_state"/>.
305
</para>
306
</listitem>
307
</varlistentry>
308
309
<varlistentry>
310
<term><option>--statedir
311
<replaceable>DIRECTORY</replaceable></option></term>
312
<listitem>
313
<xi:include href="mandos-options.xml" xpointer="statedir"/>
314
</listitem>
315
</varlistentry>
316
317
<varlistentry>
318
<term><option>--socket
319
<replaceable>FD</replaceable></option></term>
320
<listitem>
321
<xi:include href="mandos-options.xml" xpointer="socket"/>
322
</listitem>
323
</varlistentry>
324
325
<varlistentry>
326
<term><option>--foreground</option></term>
327
<listitem>
328
<xi:include href="mandos-options.xml"
329
xpointer="foreground"/>
330
</listitem>
331
</varlistentry>
332
333
<varlistentry>
334
<term><option>--no-zeroconf</option></term>
335
<listitem>
336
<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
337
</listitem>
338
</varlistentry>
339
253
340
</variablelist>
254
341
</refsect1>
255
342
275
362
start a TLS protocol handshake with a slight quirk: the Mandos
276
363
server program acts as a TLS <quote>client</quote> while the
277
364
connecting Mandos client acts as a TLS <quote>server</quote>.
278
The Mandos client must supply an OpenPGP certificate, and the
279
fingerprint of this certificate is used by the Mandos server to
280
look up (in a list read from <filename>clients.conf</filename>
281
at start time) which binary blob to give the client. No other
282
authentication or authorization is done by the server.
365
The Mandos client must supply a TLS public key, and the key ID
366
of this public key is used by the Mandos server to look up (in a
367
list read from <filename>clients.conf</filename> at start time)
368
which binary blob to give the client. No other authentication
369
or authorization is done by the server.
283
370
</para>
284
371
<table>
285
372
<title>Mandos Protocol (Version 1)</title><tgroup cols="3"><thead>
305
392
</emphasis></entry>
306
393
</row>
307
394
<row>
308
<entry>OpenPGP public key (part of TLS handshake)</entry>
395
<entry>Public key (part of TLS handshake)</entry>
309
396
<entry>-><!-- → --></entry>
310
397
</row>
311
398
<row>
329
416
for some time, the client is assumed to be compromised and is no
330
417
longer eligible to receive the encrypted password. (Manual
331
418
intervention is required to re-enable a client.) The timeout,
332
checker program, and interval between checks can be configured
333
both globally and per client; see <citerefentry>
419
extended timeout, checker program, and interval between checks
420
can be configured both globally and per client; see
421
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
422
<manvolnum>5</manvolnum></citerefentry>.
423
</para>
424
</refsect1>
425
426
<refsect1 id="approval">
427
<title>APPROVAL</title>
428
<para>
429
The server can be configured to require manual approval for a
430
client before it is sent its secret. The delay to wait for such
431
approval and the default action (approve or deny) can be
432
configured both globally and per client; see <citerefentry>
334
433
<refentrytitle>mandos-clients.conf</refentrytitle>
335
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
receiving its password will also be treated as a successful
337
checker run.
338
</para>
434
<manvolnum>5</manvolnum></citerefentry>. By default all clients
435
will be approved immediately without delay.
436
</para>
437
<para>
438
This can be used to deny a client its secret if not manually
439
approved within a specified time. It can also be used to make
440
the server delay before giving a client its secret, allowing
441
optional manual denying of this specific client.
442
</para>
443
339
444
</refsect1>
340
445
341
446
<refsect1 id="logging">
342
447
<title>LOGGING</title>
343
448
<para>
344
449
The server will send log message with various severity levels to
345
<filename>/dev/log</filename>. With the
450
<filename class="devicefile">/dev/log</filename>. With the
346
451
<option>--debug</option> option, it will log even more messages,
347
452
and also show them on the console.
348
453
</para>
349
454
</refsect1>
350
455
456
<refsect1 id="persistent_state">
457
<title>PERSISTENT STATE</title>
458
<para>
459
Client settings, initially read from
460
<filename>clients.conf</filename>, are persistent across
461
restarts, and run-time changes will override settings in
462
<filename>clients.conf</filename>. However, if a setting is
463
<emphasis>changed</emphasis> (or a client added, or removed) in
464
<filename>clients.conf</filename>, this will take precedence.
465
</para>
466
</refsect1>
467
351
468
<refsect1 id="dbus_interface">
352
469
<title>D-BUS INTERFACE</title>
353
470
<para>
354
471
The server will by default provide a D-Bus system bus interface.
355
472
This interface will only be accessible by the root user or a
356
Mandos-specific user, if such a user exists.
357
<!-- XXX -->
473
Mandos-specific user, if such a user exists. For documentation
474
of the D-Bus API, see the file <filename>DBUS-API</filename>.
358
475
</para>
359
476
</refsect1>
360
477
415
532
</listitem>
416
533
</varlistentry>
417
534
<varlistentry>
418
<term><filename>/var/run/mandos.pid</filename></term>
419
<listitem>
420
<para>
421
The file containing the process id of
422
<command>&COMMANDNAME;</command>.
423
</para>
424
</listitem>
425
</varlistentry>
426
<varlistentry>
427
<term><filename>/dev/log</filename></term>
535
<term><filename>/run/mandos.pid</filename></term>
536
<listitem>
537
<para>
538
The file containing the process id of the
539
<command>&COMMANDNAME;</command> process started last.
540
<emphasis >Note:</emphasis> If the <filename
541
class="directory">/run</filename> directory does not
542
exist, <filename>/var/run/mandos.pid</filename> will be
543
used instead.
544
</para>
545
</listitem>
546
</varlistentry>
547
<varlistentry>
548
<term><filename
549
class="directory">/var/lib/mandos</filename></term>
550
<listitem>
551
<para>
552
Directory where persistent state will be saved. Change
553
this with the <option>--statedir</option> option. See
554
also the <option>--no-restore</option> option.
555
</para>
556
</listitem>
557
</varlistentry>
558
<varlistentry>
559
<term><filename class="devicefile">/dev/log</filename></term>
428
560
<listitem>
429
561
<para>
430
562
The Unix domain socket to where local syslog messages are
453
585
backtrace. This could be considered a feature.
454
586
</para>
455
587
<para>
456
Currently, if a client is declared <quote>invalid</quote> due to
457
having timed out, the server does not record this fact onto
458
permanent storage. This has some security implications, see
459
<xref linkend="clients"/>.
460
</para>
461
<para>
462
There is currently no way of querying the server of the current
463
status of clients, other than analyzing its <systemitem
464
class="service">syslog</systemitem> output.
465
</para>
466
<para>
467
588
There is no fine-grained control over logging and debug output.
468
589
</para>
469
<para>
470
Debug mode is conflated with running in the foreground.
471
</para>
472
<para>
473
The console log messages do not show a time stamp.
474
</para>
475
<para>
476
This server does not check the expire time of clients’ OpenPGP
477
keys.
478
</para>
590
<xi:include href="bugs.xml"/>
479
591
</refsect1>
480
592
481
593
<refsect1 id="example">
491
603
<informalexample>
492
604
<para>
493
605
Run the server in debug mode, read configuration files from
494
the <filename>~/mandos</filename> directory, and use the
495
Zeroconf service name <quote>Test</quote> to not collide with
496
any other official Mandos server on this host:
606
the <filename class="directory">~/mandos</filename> directory,
607
and use the Zeroconf service name <quote>Test</quote> to not
608
collide with any other official Mandos server on this host:
497
609
</para>
498
610
<para>
499
611
531
643
<title>CLIENTS</title>
532
644
<para>
533
645
The server only gives out its stored data to clients which
534
does have the OpenPGP key of the stored fingerprint. This is
535
guaranteed by the fact that the client sends its OpenPGP
536
public key in the TLS handshake; this ensures it to be
537
genuine. The server computes the fingerprint of the key
538
itself and looks up the fingerprint in its list of
539
clients. The <filename>clients.conf</filename> file (see
646
does have the correct key ID of the stored key ID. This is
647
guaranteed by the fact that the client sends its public key in
648
the TLS handshake; this ensures it to be genuine. The server
649
computes the key ID of the key itself and looks up the key ID
650
in its list of clients. The <filename>clients.conf</filename>
651
file (see
540
652
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
541
653
<manvolnum>5</manvolnum></citerefentry>)
542
654
<emphasis>must</emphasis> be made non-readable by anyone
548
660
compromised if they are gone for too long.
549
661
</para>
550
662
<para>
551
If a client is compromised, its downtime should be duly noted
552
by the server which would therefore declare the client
553
invalid. But if the server was ever restarted, it would
554
re-read its client list from its configuration file and again
555
regard all clients therein as valid, and hence eligible to
556
receive their passwords. Therefore, be careful when
557
restarting servers if it is suspected that a client has, in
558
fact, been compromised by parties who may now be running a
559
fake Mandos client with the keys from the non-encrypted
560
initial <acronym>RAM</acronym> image of the client host. What
561
should be done in that case (if restarting the server program
562
really is necessary) is to stop the server program, edit the
563
configuration file to omit any suspect clients, and restart
564
the server program.
565
</para>
566
<para>
567
663
For more details on client-side security, see
568
664
<citerefentry><refentrytitle>mandos-client</refentrytitle>
569
665
<manvolnum>8mandos</manvolnum></citerefentry>.
574
670
<refsect1 id="see_also">
575
671
<title>SEE ALSO</title>
576
672
<para>
577
<citerefentry>
578
<refentrytitle>mandos-clients.conf</refentrytitle>
579
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
580
<refentrytitle>mandos.conf</refentrytitle>
581
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
582
<refentrytitle>mandos-client</refentrytitle>
583
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
584
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
585
</citerefentry>
673
<citerefentry><refentrytitle>intro</refentrytitle>
674
<manvolnum>8mandos</manvolnum></citerefentry>,
675
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
676
<manvolnum>5</manvolnum></citerefentry>,
677
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
678
<manvolnum>5</manvolnum></citerefentry>,
679
<citerefentry><refentrytitle>mandos-client</refentrytitle>
680
<manvolnum>8mandos</manvolnum></citerefentry>,
681
<citerefentry><refentrytitle>sh</refentrytitle>
682
<manvolnum>1</manvolnum></citerefentry>
586
683
</para>
587
684
<variablelist>
588
685
<varlistentry>
598
695
</varlistentry>
599
696
<varlistentry>
600
697
<term>
601
<ulink url="http://www.avahi.org/">Avahi</ulink>
698
<ulink url="https://www.avahi.org/">Avahi</ulink>
602
699
</term>
603
700
<listitem>
604
701
<para>
609
706
</varlistentry>
610
707
<varlistentry>
611
708
<term>
612
<ulink url="http://www.gnu.org/software/gnutls/"
613
>GnuTLS</ulink>
709
<ulink url="https://gnutls.org/">GnuTLS</ulink>
614
710
</term>
615
711
<listitem>
616
712
<para>
617
713
GnuTLS is the library this server uses to implement TLS for
618
714
communicating securely with the client, and at the same time
619
confidently get the client’s public OpenPGP key.
715
confidently get the client’s public key.
620
716
</para>
621
717
</listitem>
622
718
</varlistentry>
643
739
<listitem>
644
740
<para>
645
741
The clients use IPv6 link-local addresses, which are
646
immediately usable since a link-local addresses is
742
immediately usable since a link-local address is
647
743
automatically assigned to a network interfaces when it
648
744
is brought up.
649
745
</para>
654
750
</varlistentry>
655
751
<varlistentry>
656
752
<term>
657
RFC 4346: <citetitle>The Transport Layer Security (TLS)
658
Protocol Version 1.1</citetitle>
753
RFC 5246: <citetitle>The Transport Layer Security (TLS)
754
Protocol Version 1.2</citetitle>
659
755
</term>
660
756
<listitem>
661
757
<para>
662
TLS 1.1 is the protocol implemented by GnuTLS.
758
TLS 1.2 is the protocol implemented by GnuTLS.
663
759
</para>
664
760
</listitem>
665
761
</varlistentry>
675
771
</varlistentry>
676
772
<varlistentry>
677
773
<term>
678
RFC 5081: <citetitle>Using OpenPGP Keys for Transport Layer
679
Security</citetitle>
680
</term>
681
<listitem>
682
<para>
683
This is implemented by GnuTLS and used by this server so
684
that OpenPGP keys can be used.
774
RFC 7250: <citetitle>Using Raw Public Keys in Transport
775
Layer Security (TLS) and Datagram Transport Layer Security
776
(DTLS)</citetitle>
777
</term>
778
<listitem>
779
<para>
780
This is implemented by GnuTLS version 3.6.6 and is, if
781
present, used by this server so that raw public keys can be
782
used.
783
</para>
784
</listitem>
785
</varlistentry>
786
<varlistentry>
787
<term>
788
RFC 6091: <citetitle>Using OpenPGP Keys for Transport Layer
789
Security (TLS) Authentication</citetitle>
790
</term>
791
<listitem>
792
<para>
793
This is implemented by GnuTLS before version 3.6.0 and is,
794
if present, used by this server so that OpenPGP keys can be
795
used.
685
796
</para>
686
797
</listitem>
687
798
</varlistentry>
Loggerhead is a web-based interface for Breezy
Version: 2.0.2.dev0