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"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
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<!ENTITY VERSION "1.0">
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<!ENTITY COMMANDNAME "mandos">
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<!ENTITY OVERVIEW SYSTEM "overview.xml">
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<!ENTITY TIMESTAMP "2008-09-01">
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<refentry xmlns:xi="http://www.w3.org/2001/XInclude">
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<title>&COMMANDNAME;</title>
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<title>Mandos Manual</title>
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<!-- NWalsh’s docbook scripts use this to generate the footer: -->
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<productname>&COMMANDNAME;</productname>
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<productname>Mandos</productname>
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<productnumber>&VERSION;</productnumber>
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<date>&TIMESTAMP;</date>
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<firstname>Björn</firstname>
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<holder>Teddy Hogeborn</holder>
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<holder>Björn Påhlsson</holder>
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This manual page is free software: you can redistribute it
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and/or modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation,
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either version 3 of the License, or (at your option) any
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This manual page is distributed in the hope that it will
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be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A
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PARTICULAR PURPOSE. See the GNU General Public License
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You should have received a copy of the GNU General Public
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License along with this program; If not, see
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<ulink url="http://www.gnu.org/licenses/"/>.
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<xi:include href="legalnotice.xml"/>
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<refname><command>&COMMANDNAME;</command></refname>
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Sends encrypted passwords to authenticated Mandos clients
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Gives encrypted passwords to authenticated Mandos clients
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<command>&COMMANDNAME;</command>
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<arg>--interface<arg choice="plain">IF</arg></arg>
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<arg>--address<arg choice="plain">ADDRESS</arg></arg>
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<arg>--port<arg choice="plain">PORT</arg></arg>
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<arg>--priority<arg choice="plain">PRIORITY</arg></arg>
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<arg>--servicename<arg choice="plain">NAME</arg></arg>
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<arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
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<command>&COMMANDNAME;</command>
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<arg>-i<arg choice="plain">IF</arg></arg>
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<arg>-a<arg choice="plain">ADDRESS</arg></arg>
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<arg>-p<arg choice="plain">PORT</arg></arg>
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<arg>--priority<arg choice="plain">PRIORITY</arg></arg>
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<arg>--servicename<arg choice="plain">NAME</arg></arg>
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<arg>--configdir<arg choice="plain">DIRECTORY</arg></arg>
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<arg choice="plain"><option>--interface
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<replaceable>NAME</replaceable></option></arg>
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<arg choice="plain"><option>-i
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<replaceable>NAME</replaceable></option></arg>
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<arg choice="plain"><option>--address
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<replaceable>ADDRESS</replaceable></option></arg>
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<arg choice="plain"><option>-a
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<replaceable>ADDRESS</replaceable></option></arg>
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<arg choice="plain"><option>--port
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<replaceable>PORT</replaceable></option></arg>
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<arg choice="plain"><option>-p
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<replaceable>PORT</replaceable></option></arg>
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<arg><option>--priority
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<replaceable>PRIORITY</replaceable></option></arg>
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<arg><option>--servicename
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<replaceable>NAME</replaceable></option></arg>
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<arg><option>--configdir
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<replaceable>DIRECTORY</replaceable></option></arg>
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<arg><option>--debug</option></arg>
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<command>&COMMANDNAME;</command>
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<group choice="req">
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<arg choice="plain">-h</arg>
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<arg choice="plain">--help</arg>
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<arg choice="plain"><option>--help</option></arg>
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<arg choice="plain"><option>-h</option></arg>
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<command>&COMMANDNAME;</command>
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<arg choice="plain">--version</arg>
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<arg choice="plain"><option>--version</option></arg>
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<command>&COMMANDNAME;</command>
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<arg choice="plain">--check</arg>
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<arg choice="plain"><option>--check</option></arg>
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</refsynopsisdiv>
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<emphasis>encrypted root file system</emphasis>. See <xref
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linkend="overview"/> for details.
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<refsect1 id="options">
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<title>OPTIONS</title>
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<term><literal>-h</literal>, <literal>--help</literal></term>
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<term><option>--help</option></term>
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<term><option>-h</option></term>
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Show a help message and exit
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<term><literal>-i</literal>, <literal>--interface <replaceable>
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IF</replaceable></literal></term>
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Only announce the server and listen to requests on network
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interface <replaceable>IF</replaceable>. Default is to
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use all available interfaces. <emphasis>Note:</emphasis>
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a failure to bind to the specified interface is not
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considered critical, and the server does not exit.
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<term><literal>-a</literal>, <literal>--address <replaceable>
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ADDRESS</replaceable></literal></term>
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If this option is used, the server will only listen to a
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specific address. This must currently be an IPv6 address;
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an IPv4 address can be specified using the
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<quote><literal>::FFFF:192.0.2.3</literal></quote> syntax.
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Also, if a link-local address is specified, an interface
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should be set, since a link-local address is only valid on
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a single interface. By default, the server will listen to
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all available addresses.
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<term><literal>-p</literal>, <literal>--port <replaceable>
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PORT</replaceable></literal></term>
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If this option is used, the server to bind to that
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port. By default, the server will listen to an arbitrary
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port given by the operating system.
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<term><literal>--check</literal></term>
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<term><option>--interface</option>
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<replaceable>NAME</replaceable></term>
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<term><option>-i</option>
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<replaceable>NAME</replaceable></term>
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<xi:include href="mandos-options.xml" xpointer="interface"/>
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<term><option>--address
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<replaceable>ADDRESS</replaceable></option></term>
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<replaceable>ADDRESS</replaceable></option></term>
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<xi:include href="mandos-options.xml" xpointer="address"/>
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<replaceable>PORT</replaceable></option></term>
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<replaceable>PORT</replaceable></option></term>
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<xi:include href="mandos-options.xml" xpointer="port"/>
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<term><option>--check</option></term>
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Run the server’s self-tests. This includes any unit
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<term><literal>--debug</literal></term>
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If the server is run in debug mode, it will run in the
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foreground and print a lot of debugging information. The
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default is <emphasis>not</emphasis> to run in debug mode.
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<term><literal>--priority <replaceable>
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PRIORITY</replaceable></literal></term>
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GnuTLS priority string for the TLS handshake with the
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clients. The default is
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<quote><literal>SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP</literal></quote>.
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See <citerefentry><refentrytitle>gnutls_priority_init
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</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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for the syntax. <emphasis>Warning</emphasis>: changing
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this may make the TLS handshake fail, making communication
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with clients impossible.
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<term><literal>--servicename <replaceable>NAME</replaceable>
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Zeroconf service name. The default is
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<quote><literal>Mandos</literal></quote>. You only need
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to change this if you for some reason want to run more
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than one server on the same <emphasis>host</emphasis>,
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which would not normally be useful. If there are name
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collisions on the same <emphasis>network</emphasis>, the
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newer server will automatically rename itself to
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<quote><literal>Mandos #2</literal></quote>, and so on;
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therefore, this option is not needed in that case.
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<term><literal>--configdir <replaceable>DIR</replaceable>
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<term><option>--debug</option></term>
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<xi:include href="mandos-options.xml" xpointer="debug"/>
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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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<term><option>--servicename
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<replaceable>NAME</replaceable></option></term>
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<xi:include href="mandos-options.xml"
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xpointer="servicename"/>
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<term><option>--configdir
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<replaceable>DIRECTORY</replaceable></option></term>
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Directory to search for configuration files. Default is
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longer eligible to receive the encrypted password. 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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<refentrytitle>mandos.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry> and <citerefentry>
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<refentrytitle>mandos-clients.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>.
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<refsect1 id="logging">
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<title>LOGGING</title>
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The server will send log messaged with various severity levels
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to <filename>/dev/log</filename>. With the
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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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<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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re-read its client list from its configuration file and again
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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 you suspect that a client has, in fact,
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been compromised by parties who may now be running a fake
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Mandos client with the keys from the non-encrypted initial RAM
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image of the client host. What should be done in that case
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(if restarting the server program really is necessary) is to
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stop the server program, edit the configuration file to omit
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any suspect clients, and restart the server program.
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restarting servers if it is suspected that a client has, in
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fact, been compromised by parties who may now be running a
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fake Mandos client with the keys from the non-encrypted
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initial <acronym>RAM</acronym> image of the client host. What
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should be done in that case (if restarting the server program
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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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For more details on client-side security, see
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<refsect1 id="see_also">
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<title>SEE ALSO</title>
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<refentrytitle>mandos-clients.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
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<refentrytitle>mandos.conf</refentrytitle>
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<manvolnum>5</manvolnum></citerefentry>, <citerefentry>
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<refentrytitle>password-request</refentrytitle>
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<manvolnum>8mandos</manvolnum></citerefentry>, <citerefentry>
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<refentrytitle>sh</refentrytitle><manvolnum>1</manvolnum>
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<refentrytitle>password-request</refentrytitle>
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<manvolnum>8mandos</manvolnum>
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This is the actual program which talks to this server.
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Note that it is normally not invoked directly, and is only
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run in the initial RAM disk environment, and not on a
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fully started system.
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<ulink url="http://www.zeroconf.org/">Zeroconf</ulink>
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<citation>RFC 4291: <citetitle>IP Version 6 Addressing
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Architecture</citetitle>, section 2.5.6, Link-Local IPv6
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Unicast Addresses</citation>
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RFC 4291: <citetitle>IP Version 6 Addressing
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Architecture</citetitle>
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The clients use IPv6 link-local addresses, which are
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immediately usable since a link-local addresses is
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automatically assigned to a network interfaces when it is
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<term>Section 2.2: <citetitle>Text Representation of
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Addresses</citetitle></term>
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<listitem><para/></listitem>
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<term>Section 2.5.5.2: <citetitle>IPv4-Mapped IPv6
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Address</citetitle></term>
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<listitem><para/></listitem>
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<term>Section 2.5.6, <citetitle>Link-Local IPv6 Unicast
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Addresses</citetitle></term>
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The clients use IPv6 link-local addresses, which are
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immediately usable since a link-local addresses is
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automatically assigned to a network interfaces when it
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<citation>RFC 4346: <citetitle>The Transport Layer Security
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(TLS) Protocol Version 1.1</citetitle></citation>
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RFC 4346: <citetitle>The Transport Layer Security (TLS)
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Protocol Version 1.1</citetitle>