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 "2011-08-08">
6
6
<!ENTITY % common SYSTEM "common.ent">
87
89
<arg><option>--debug</option></arg>
91
<arg><option>--debuglevel
92
<replaceable>LEVEL</replaceable></option></arg>
89
94
<arg><option>--no-dbus</option></arg>
91
96
<arg><option>--no-ipv6</option></arg>
113
118
<command>&COMMANDNAME;</command> is a server daemon which
114
119
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.
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>.
197
222
<term><option>--priority <replaceable>
198
223
PRIORITY</replaceable></option></term>
329
354
for some time, the client is assumed to be compromised and is no
330
355
longer eligible to receive the encrypted password. (Manual
331
356
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>
334
<refentrytitle>mandos-clients.conf</refentrytitle>
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>
335
360
<manvolnum>5</manvolnum></citerefentry>. A client successfully
336
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>
373
<refentrytitle>mandos-clients.conf</refentrytitle>
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.
341
386
<refsect1 id="logging">
342
387
<title>LOGGING</title>
354
399
The server will by default provide a D-Bus system bus interface.
355
400
This interface will only be accessible by the root user or a
356
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>.
418
463
<term><filename>/var/run/mandos.pid</filename></term>
421
The file containing the process id of
422
<command>&COMMANDNAME;</command>.
466
The file containing the process id of the
467
<command>&COMMANDNAME;</command> process started last.
453
498
backtrace. This could be considered a feature.
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"/>.
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.
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"/>.
467
506
There is no fine-grained control over logging and debug output.
551
590
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
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.
567
605
For more details on client-side security, see
574
612
<refsect1 id="see_also">
575
613
<title>SEE ALSO</title>
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>
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
