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<firstname>Björn</firstname>
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<surname>Påhlsson</surname>
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<email>belorn@fukt.bsnet.se</email>
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<email>belorn@recompile.se</email>
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<firstname>Teddy</firstname>
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<surname>Hogeborn</surname>
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<email>teddy@fukt.bsnet.se</email>
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<email>teddy@recompile.se</email>
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<holder>Teddy Hogeborn</holder>
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<holder>Björn Påhlsson</holder>
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<arg><option>--debug</option></arg>
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<arg><option>--debuglevel
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<replaceable>LEVEL</replaceable></option></arg>
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<arg><option>--no-dbus</option></arg>
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<arg><option>--no-ipv6</option></arg>
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<arg><option>--no-restore</option></arg>
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<arg><option>--statedir
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<replaceable>DIRECTORY</replaceable></option></arg>
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<arg><option>--socket
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<replaceable>FD</replaceable></option></arg>
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<arg><option>--foreground</option></arg>
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<arg><option>--no-zeroconf</option></arg>
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<command>&COMMANDNAME;</command>
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<command>&COMMANDNAME;</command> is a server daemon which
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handles incoming request for passwords for a pre-defined list of
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client host computers. The Mandos server uses Zeroconf to
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announce itself on the local network, and uses TLS to
117
communicate securely with and to authenticate the clients. The
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Mandos server uses IPv6 to allow Mandos clients to use IPv6
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link-local addresses, since the clients will probably not have
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any other addresses configured (see <xref linkend="overview"/>).
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Any authenticated client is then given the stored pre-encrypted
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password for that specific client.
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client host computers. For an introduction, see
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<citerefentry><refentrytitle>intro</refentrytitle>
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<manvolnum>8mandos</manvolnum></citerefentry>. The Mandos server
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uses Zeroconf to announce itself on the local network, and uses
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TLS to communicate securely with and to authenticate the
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clients. The Mandos server uses IPv6 to allow Mandos clients to
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use IPv6 link-local addresses, since the clients will probably
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not have any other addresses configured (see <xref
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linkend="overview"/>). Any authenticated client is then given
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the stored pre-encrypted password for that specific client.
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<term><option>--debuglevel
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<replaceable>LEVEL</replaceable></option></term>
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Set the debugging log level.
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<replaceable>LEVEL</replaceable> is a string, one of
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<quote><literal>CRITICAL</literal></quote>,
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<quote><literal>ERROR</literal></quote>,
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<quote><literal>WARNING</literal></quote>,
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<quote><literal>INFO</literal></quote>, or
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<quote><literal>DEBUG</literal></quote>, in order of
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increasing verbosity. The default level is
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<quote><literal>WARNING</literal></quote>.
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<term><option>--priority <replaceable>
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PRIORITY</replaceable></option></term>
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<xi:include href="mandos-options.xml" xpointer="priority"/>
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<xi:include href="mandos-options.xml"
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xpointer="priority_compat"/>
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<xi:include href="mandos-options.xml" xpointer="ipv6"/>
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<term><option>--no-restore</option></term>
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<xi:include href="mandos-options.xml" xpointer="restore"/>
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See also <xref linkend="persistent_state"/>.
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<term><option>--statedir
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<replaceable>DIRECTORY</replaceable></option></term>
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<xi:include href="mandos-options.xml" xpointer="statedir"/>
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<term><option>--socket
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<replaceable>FD</replaceable></option></term>
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<xi:include href="mandos-options.xml" xpointer="socket"/>
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<term><option>--foreground</option></term>
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<xi:include href="mandos-options.xml"
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xpointer="foreground"/>
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<term><option>--no-zeroconf</option></term>
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<xi:include href="mandos-options.xml" xpointer="zeroconf"/>
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for some time, the client is assumed to be compromised and is no
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longer eligible to receive the encrypted password. (Manual
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413
intervention is required to re-enable a client.) The timeout,
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checker program, and interval between checks can be configured
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both globally and per client; see <citerefentry>
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extended timeout, checker program, and interval between checks
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can be configured both globally and per client; see
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<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>.
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<refsect1 id="approval">
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<title>APPROVAL</title>
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The server can be configured to require manual approval for a
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client before it is sent its secret. The delay to wait for such
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approval and the default action (approve or deny) can be
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configured both globally and per client; see <citerefentry>
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<refentrytitle>mandos-clients.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>. A client successfully
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receiving its password will also be treated as a successful
429
<manvolnum>5</manvolnum></citerefentry>. By default all clients
430
will be approved immediately without delay.
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This can be used to deny a client its secret if not manually
434
approved within a specified time. It can also be used to make
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the server delay before giving a client its secret, allowing
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optional manual denying of this specific client.
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<refsect1 id="logging">
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<title>LOGGING</title>
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The server will send log message with various severity levels to
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<filename>/dev/log</filename>. With the
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<filename class="devicefile">/dev/log</filename>. With the
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<option>--debug</option> option, it will log even more messages,
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and also show them on the console.
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<refsect1 id="persistent_state">
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<title>PERSISTENT STATE</title>
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Client settings, initially read from
455
<filename>clients.conf</filename>, are persistent across
456
restarts, and run-time changes will override settings in
457
<filename>clients.conf</filename>. However, if a setting is
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<emphasis>changed</emphasis> (or a client added, or removed) in
459
<filename>clients.conf</filename>, this will take precedence.
351
463
<refsect1 id="dbus_interface">
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<title>D-BUS INTERFACE</title>
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The server will by default provide a D-Bus system bus interface.
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This interface will only be accessible by the root user or a
356
Mandos-specific user, if such a user exists.
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Mandos-specific user, if such a user exists. For documentation
469
of the D-Bus API, see the file <filename>DBUS-API</filename>.
418
<term><filename>/var/run/mandos.pid</filename></term>
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The file containing the process id of
422
<command>&COMMANDNAME;</command>.
530
<term><filename>/run/mandos.pid</filename></term>
533
The file containing the process id of the
534
<command>&COMMANDNAME;</command> process started last.
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<emphasis >Note:</emphasis> If the <filename
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class="directory">/run</filename> directory does not
537
exist, <filename>/var/run/mandos.pid</filename> will be
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<term><filename class="devicefile">/dev/log</filename></term>
547
class="directory">/var/lib/mandos</filename></term>
550
Directory where persistent state will be saved. Change
551
this with the <option>--statedir</option> option. See
552
also the <option>--no-restore</option> option.
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583
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
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permanent storage. This has some security implications, see
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<xref linkend="clients"/>.
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There is currently no way of querying the server of the current
463
status of clients, other than analyzing its <systemitem
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class="service">syslog</systemitem> output.
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There is no fine-grained control over logging and debug output.
470
Debug mode is conflated with running in the foreground.
473
The console log messages do not show a time stamp.
476
589
This server does not check the expire time of clients’ OpenPGP
491
604
<informalexample>
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606
Run the server in debug mode, read configuration files from
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the <filename>~/mandos</filename> directory, and use the
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Zeroconf service name <quote>Test</quote> to not collide with
496
any other official Mandos server on this host:
607
the <filename class="directory">~/mandos</filename> directory,
608
and use the Zeroconf service name <quote>Test</quote> to not
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collide with any other official Mandos server on this host:
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661
compromised if they are gone for too long.
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
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receive their passwords. Therefore, be careful when
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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
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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
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configuration file to omit any suspect clients, and restart
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664
For more details on client-side security, see
568
665
<citerefentry><refentrytitle>mandos-client</refentrytitle>
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<manvolnum>8mandos</manvolnum></citerefentry>.
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671
<refsect1 id="see_also">
575
672
<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>
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<citerefentry><refentrytitle>intro</refentrytitle>
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<manvolnum>8mandos</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>mandos-clients.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>,
678
<citerefentry><refentrytitle>mandos.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>mandos-client</refentrytitle>
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<manvolnum>8mandos</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sh</refentrytitle>
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<manvolnum>1</manvolnum></citerefentry>
added
removed
mandos.xml
