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 "2009-01-04">
5
<!ENTITY TIMESTAMP "2011-08-08">
6
6
<!ENTITY % common SYSTEM "common.ent">
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>
91
99
<command>&COMMANDNAME;</command>
110
118
<command>&COMMANDNAME;</command> is a server daemon which
111
119
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.
120
client host computers. For an introduction, see
121
<citerefentry><refentrytitle>intro</refentrytitle>
122
<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
123
uses Zeroconf to announce itself on the local network, and uses
124
TLS to communicate securely with and to authenticate the
125
clients. The Mandos server uses IPv6 to allow Mandos clients to
126
use IPv6 link-local addresses, since the clients will probably
127
not have any other addresses configured (see <xref
128
linkend="overview"/>). Any authenticated client is then given
129
the stored pre-encrypted password for that specific client.
204
<term><option>--debuglevel
205
<replaceable>LEVEL</replaceable></option></term>
208
Set the debugging log level.
209
<replaceable>LEVEL</replaceable> is a string, one of
210
<quote><literal>CRITICAL</literal></quote>,
211
<quote><literal>ERROR</literal></quote>,
212
<quote><literal>WARNING</literal></quote>,
213
<quote><literal>INFO</literal></quote>, or
214
<quote><literal>DEBUG</literal></quote>, in order of
215
increasing verbosity. The default level is
216
<quote><literal>WARNING</literal></quote>.
194
222
<term><option>--priority <replaceable>
195
223
PRIORITY</replaceable></option></term>
317
352
The server will, by default, continually check that the clients
318
353
are still up. If a client has not been confirmed as being up
319
354
for some time, the client is assumed to be compromised and is no
320
longer eligible to receive the encrypted password. The timeout,
321
checker program, and interval between checks can be configured
322
both globally and per client; see <citerefentry>
355
longer eligible to receive the encrypted password. (Manual
356
intervention is required to re-enable a client.) The timeout,
357
extended timeout, checker program, and interval between checks
358
can be configured both globally and per client; see
359
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
360
<manvolnum>5</manvolnum></citerefentry>. A client successfully
361
receiving its password will also be treated as a successful
366
<refsect1 id="approval">
367
<title>APPROVAL</title>
369
The server can be configured to require manual approval for a
370
client before it is sent its secret. The delay to wait for such
371
approval and the default action (approve or deny) can be
372
configured both globally and per client; see <citerefentry>
323
373
<refentrytitle>mandos-clients.conf</refentrytitle>
324
<manvolnum>5</manvolnum></citerefentry>.
374
<manvolnum>5</manvolnum></citerefentry>. By default all clients
375
will be approved immediately without delay.
378
This can be used to deny a client its secret if not manually
379
approved within a specified time. It can also be used to make
380
the server delay before giving a client its secret, allowing
381
optional manual denying of this specific client.
328
386
<refsect1 id="logging">
341
399
The server will by default provide a D-Bus system bus interface.
342
400
This interface will only be accessible by the root user or a
343
Mandos-specific user, if such a user exists.
401
Mandos-specific user, if such a user exists. For documentation
402
of the D-Bus API, see the file <filename>DBUS-API</filename>.
348
406
<refsect1 id="exit_status">
349
407
<title>EXIT STATUS</title>
405
463
<term><filename>/var/run/mandos.pid</filename></term>
408
The file containing the process id of
409
<command>&COMMANDNAME;</command>.
466
The file containing the process id of the
467
<command>&COMMANDNAME;</command> process started last.
440
498
backtrace. This could be considered a feature.
443
Currently, if a client is declared <quote>invalid</quote> due to
444
having timed out, the server does not record this fact onto
445
permanent storage. This has some security implications, see
446
<xref linkend="clients"/>.
449
There is currently no way of querying the server of the current
450
status of clients, other than analyzing its <systemitem
451
class="service">syslog</systemitem> output.
501
Currently, if a client is disabled due to having timed out, the
502
server does not record this fact onto permanent storage. This
503
has some security implications, see <xref linkend="clients"/>.
454
506
There is no fine-grained control over logging and debug output.
457
509
Debug mode is conflated with running in the foreground.
460
The console log messages does not show a time stamp.
512
The console log messages do not show a time stamp.
463
515
This server does not check the expire time of clients’ OpenPGP
538
590
If a client is compromised, its downtime should be duly noted
539
by the server which would therefore declare the client
540
invalid. But if the server was ever restarted, it would
541
re-read its client list from its configuration file and again
542
regard all clients therein as valid, and hence eligible to
543
receive their passwords. Therefore, be careful when
544
restarting servers if it is suspected that a client has, in
545
fact, been compromised by parties who may now be running a
546
fake Mandos client with the keys from the non-encrypted
547
initial <acronym>RAM</acronym> image of the client host. What
548
should be done in that case (if restarting the server program
549
really is necessary) is to stop the server program, edit the
550
configuration file to omit any suspect clients, and restart
591
by the server which would therefore disable the client. But
592
if the server was ever restarted, it would re-read its client
593
list from its configuration file and again regard all clients
594
therein as enabled, and hence eligible to receive their
595
passwords. Therefore, be careful when restarting servers if
596
it is suspected that a client has, in fact, been compromised
597
by parties who may now be running a fake Mandos client with
598
the keys from the non-encrypted initial <acronym>RAM</acronym>
599
image of the client host. What should be done in that case
600
(if restarting the server program really is necessary) is to
601
stop the server program, edit the configuration file to omit
602
any suspect clients, and restart the server program.
554
605
For more details on client-side security, see
561
612
<refsect1 id="see_also">
562
613
<title>SEE ALSO</title>
565
<refentrytitle>mandos-clients.conf</refentrytitle>
566
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
567
<refentrytitle>mandos.conf</refentrytitle>
568
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
569
<refentrytitle>mandos-client</refentrytitle>
570
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
571
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
615
<citerefentry><refentrytitle>intro</refentrytitle>
616
<manvolnum>8mandos</manvolnum></citerefentry>,
617
<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
618
<manvolnum>5</manvolnum></citerefentry>,
619
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
620
<manvolnum>5</manvolnum></citerefentry>,
621
<citerefentry><refentrytitle>mandos-client</refentrytitle>
622
<manvolnum>8mandos</manvolnum></citerefentry>,
623
<citerefentry><refentrytitle>sh</refentrytitle>
624
<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
