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 "2011-10-03">
5
<!ENTITY TIMESTAMP "2009-02-15">
6
6
<!ENTITY % common SYSTEM "common.ent">
19
19
<firstname>Björn</firstname>
20
20
<surname>Påhlsson</surname>
22
<email>belorn@recompile.se</email>
22
<email>belorn@fukt.bsnet.se</email>
26
26
<firstname>Teddy</firstname>
27
27
<surname>Hogeborn</surname>
29
<email>teddy@recompile.se</email>
29
<email>teddy@fukt.bsnet.se</email>
38
36
<holder>Teddy Hogeborn</holder>
39
37
<holder>Björn Påhlsson</holder>
89
87
<arg><option>--debug</option></arg>
91
<arg><option>--debuglevel
92
<replaceable>LEVEL</replaceable></option></arg>
94
89
<arg><option>--no-dbus</option></arg>
96
91
<arg><option>--no-ipv6</option></arg>
118
113
<command>&COMMANDNAME;</command> is a server daemon which
119
114
handles incoming request for passwords for a pre-defined list of
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.
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.
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>.
222
197
<term><option>--priority <replaceable>
223
198
PRIORITY</replaceable></option></term>
352
327
The server will, by default, continually check that the clients
353
328
are still up. If a client has not been confirmed as being up
354
329
for some time, the client is assumed to be compromised and is no
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>
330
longer eligible to receive the encrypted password. The timeout,
331
checker program, and interval between checks can be configured
332
both globally and per client; see <citerefentry>
373
333
<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.
334
<manvolnum>5</manvolnum></citerefentry>.
386
338
<refsect1 id="logging">
399
351
The server will by default provide a D-Bus system bus interface.
400
352
This interface will only be accessible by the root user or a
401
Mandos-specific user, if such a user exists. For documentation
402
of the D-Bus API, see the file <filename>DBUS-API</filename>.
353
Mandos-specific user, if such a user exists.
463
415
<term><filename>/var/run/mandos.pid</filename></term>
466
The file containing the process id of the
467
<command>&COMMANDNAME;</command> process started last.
418
The file containing the process id of
419
<command>&COMMANDNAME;</command>.
498
450
backtrace. This could be considered a feature.
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"/>.
453
Currently, if a client is declared <quote>invalid</quote> due to
454
having timed out, the server does not record this fact onto
455
permanent storage. This has some security implications, see
456
<xref linkend="clients"/>.
459
There is currently no way of querying the server of the current
460
status of clients, other than analyzing its <systemitem
461
class="service">syslog</systemitem> output.
506
464
There is no fine-grained control over logging and debug output.
590
548
If a client is compromised, its downtime should be duly noted
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.
549
by the server which would therefore declare the client
550
invalid. But if the server was ever restarted, it would
551
re-read its client list from its configuration file and again
552
regard all clients therein as valid, and hence eligible to
553
receive their passwords. Therefore, be careful when
554
restarting servers if it is suspected that a client has, in
555
fact, been compromised by parties who may now be running a
556
fake Mandos client with the keys from the non-encrypted
557
initial <acronym>RAM</acronym> image of the client host. What
558
should be done in that case (if restarting the server program
559
really is necessary) is to stop the server program, edit the
560
configuration file to omit any suspect clients, and restart
605
564
For more details on client-side security, see
612
571
<refsect1 id="see_also">
613
572
<title>SEE ALSO</title>
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>
575
<refentrytitle>mandos-clients.conf</refentrytitle>
576
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
577
<refentrytitle>mandos.conf</refentrytitle>
578
<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
579
<refentrytitle>mandos-client</refentrytitle>
580
<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
581
<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
added
removed
mandos.xml
