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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 CONFNAME "mandos-clients.conf">
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<!ENTITY CONFPATH "<filename>/etc/mandos/clients.conf</filename>">
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<title>&CONFNAME;</title>
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<!-- NWalsh’s docbook scripts use this to generate the footer: -->
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<productname>&CONFNAME;</productname>
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<productnumber>&VERSION;</productnumber>
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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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<firstname>Teddy</firstname>
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<surname>Hogeborn</surname>
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<email>teddy@fukt.bsnet.se</email>
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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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<refentrytitle>&CONFNAME;</refentrytitle>
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<manvolnum>5</manvolnum>
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<refname><filename>&CONFNAME;</filename></refname>
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Configuration file for the Mandos server
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<refsect1 id="description">
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<title>DESCRIPTION</title>
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The file &CONFPATH; is the configuration file for <citerefentry
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><refentrytitle>mandos</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry>, read by it at startup,
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where each client that will be able to use the service needs to
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be listed. All clients listed will be regarded as valid, even
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if a client was declared invalid in a previous run of the
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The format starts with a <literal>[<replaceable>section
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header</replaceable>]</literal> which is either
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<literal>[DEFAULT]</literal> or <literal>[<replaceable>client
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name</replaceable>]</literal>. The <replaceable>client
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name</replaceable> can be anything, and is not tied to a host
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name. Following the section header is any number of
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<quote><varname><replaceable>option</replaceable
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></varname>=<replaceable>value</replaceable></quote> entries,
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with continuations in the style of RFC 822. <quote><varname
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><replaceable>option</replaceable></varname>: <replaceable
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>value</replaceable></quote> is also accepted. Note that
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leading whitespace is removed from values. Values can contain
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format strings which refer to other values in the same section,
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or values in the <quote>DEFAULT</quote> section (see <xref
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linkend="expansion"/>). Lines beginning with <quote>#</quote>
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or <quote>;</quote> are ignored and may be used to provide
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<refsect1 id="options">
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<title>OPTIONS</title>
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The possible options are:
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<term><literal><varname>timeout</varname></literal></term>
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<synopsis><literal>timeout = </literal><replaceable
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The timeout is how long the server will wait for a
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successful checker run until a client is considered
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invalid - that is, ineligible to get the data this server
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holds. By default Mandos will use 1 hour.
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The <replaceable>TIME</replaceable> is specified as a
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space-separated number of values, each of which is a
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number and a one-character suffix. The suffix must be one
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of <quote>d</quote>, <quote>s</quote>, <quote>m</quote>,
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<quote>h</quote>, and <quote>w</quote> for days, seconds,
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minutes, hours, and weeks, respectively. The values are
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added together to give the total time value, so all of
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<quote><literal>330s</literal></quote>,
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<quote><literal>110s 110s 110s</literal></quote>, and
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<quote><literal>5m 30s</literal></quote> will give a value
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of five minutes and thirty seconds.
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<term><literal><varname>interval</varname></literal></term>
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<synopsis><literal>interval = </literal><replaceable
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How often to run the checker to confirm that a client is
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still up. <emphasis>Note:</emphasis> a new checker will
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not be started if an old one is still running. The server
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will wait for a checker to complete until the above
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<quote><varname>timeout</varname></quote> occurs, at which
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time the client will be marked invalid, and any running
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checker killed. The default interval is 5 minutes.
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The format of <replaceable>TIME</replaceable> is the same
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as for <varname>timeout</varname> above.
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<term><literal>checker</literal></term>
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<synopsis><literal>checker = </literal><replaceable
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>COMMAND</replaceable>
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This option allows you to override the default shell
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command that the server will use to check if the client is
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still up. The output of the command will be ignored, only
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the exit code is checked. The command will be run using
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<quote><command><filename>/bin/sh</filename>
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<option>-c</option></command></quote>. The default
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command is <quote><literal><command>fping</command>
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<option>-q</option> <option>--</option>
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%(host)s</literal></quote>.
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In addition to normal start time expansion, this option
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will also be subject to runtime expansion; see <xref
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linkend="expansion"/>.
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<term><literal>fingerprint</literal></term>
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<synopsis><literal>fingerprint = </literal><replaceable
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>HEXSTRING</replaceable>
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This option sets the OpenPGP fingerprint that identifies
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the public key that clients authenticate themselves with
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through TLS. The string needs to be in hexidecimal form,
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but spaces or upper/lower case are not significant.
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<term><literal>secret</literal></term>
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<synopsis><literal>secret = </literal><replaceable
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>BASE64_ENCODED_DATA</replaceable>
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If present, this option must be set to a string of
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base64-encoded binary data. It will be decoded and sent
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to the client matching the above
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<option>fingerprint</option>. This should, of course, be
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OpenPGP encrypted data, decryptable only by the client.
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<!-- The program <citerefentry><refentrytitle><command -->
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<!-- >mandos-keygen</command></refentrytitle><manvolnum -->
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<!-- >8</manvolnum></citerefentry> can be used to generate it, -->
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Note: this value of this option will probably run over
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many lines, and will then have to use the fact that a line
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beginning with white space adds to the value of the
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previous line, RFC 822-style.
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<term><literal>secfile</literal></term>
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Base 64 encoded OpenPGP encrypted password encrypted by
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the clients openpgp certificate as a binary file.
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<term><literal>host</literal></term>
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Host name that can be used in for checking that the client is up.
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<term><literal>checker</literal></term>
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Shell command that the server will use to check up if a
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<term><literal>timeout</literal></term>
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Duration that a client can be down whitout be removed from
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<refsect1 id="expansion">
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<title>EXPANSION</title>
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There are two forms of expansion: Start time expansion and
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<refsect2 id="start_time_expansion">
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<title>START TIME EXPANSION</title>
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Any string in an option value of the form
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<quote><literal>%(<replaceable>foo</replaceable>)s</literal
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></quote> will be replaced by the value of the option
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<varname>foo</varname> either in the same section, or, if it
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does not exist there, the <literal>[DEFAULT]</literal>
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section. This is done at start time, when the configuration
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Note that this means that, in order to include an actual
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percent character (<quote>%</quote>) in an option value, two
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percent characters in a row (<quote>%%</quote>) must be
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<refsect2 id="runtime_expansion">
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<title>RUNTIME EXPANSION</title>
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This is currently only done for the <varname>checker</varname>
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Any string in an option value of the form
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<quote><literal>%%(<replaceable>foo</replaceable>)s</literal
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></quote> will be replaced by the value of the attribute
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<varname>foo</varname> of the internal
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<quote><classname>Client</classname></quote> object. See the
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source code for details, and let the authors know of any
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attributes that are useful so they may be preserved to any new
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versions of this software.
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Note that this means that, in order to include an actual
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percent character (<quote>%</quote>) in a
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<varname>checker</varname> options, <emphasis>four</emphasis>
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percent characters in a row (<quote>%%%%</quote>) must be
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entered. Also, a bad format here will lead to an immediate
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but <emphasis>silent</emphasis> run-time fatal exit; debug
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mode is needed to track down an error of this kind.
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<refsect1 id="files">
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The file described here is &CONFPATH;
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The format for specifying times for <varname>timeout</varname>
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and <varname>interval</varname> is not very good.
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The difference between
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<literal>%%(<replaceable>foo</replaceable>)s</literal> and
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<literal>%(<replaceable>foo</replaceable>)s</literal> is
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<refsect1 id="example">
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<title>EXAMPLE</title>
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checker = fping -q -- %(host)s
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fingerprint = 7788 2722 5BA7 DE53 9C5A 7CFA 59CF F7CD BD9A 5920
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hQIOA6QdEjBs2L/HEAf/TCyrDe5Xnm9esa+Pb/vWF9CUqfn4srzVgSu234
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REJMVv7lBSrPE2132Lmd2gqF1HeLKDJRSVxJpt6xoWOChGHg+TMyXDxK+N
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Xl89vGvdU1XfhKkVm9MDLOgT5ECDPysDGHFPDhqHOSu3Kaw2DWMV/iH9vz
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3Z20erVNbdcvyBnuojcoWO/6yfB5EQO0BXp7kcyy00USA3CjD5FGZdoQGI
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Tb8A/ar0tVA5crSQmaSotm6KmNLhrFnZ5BxX+TiE+eTUTqSloWRY6VAvqW
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QHC7OASxK5E6RXPBuFH5IohUA2Qbk5AHt99pYvsIPX88j2rWauOokoiKZo
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t/9leJ8VxO5l3wf/U64IH8bkPIoWmWZfd/nqh4uwGNbCgKMyT+AnvH7kMJ
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3i7DivfWl2mKLV0PyPHUNva0VQxX6yYjcOhj1R6fCr/at8/NSLe2OhLchz
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dC+Ls9h+kvJXgF8Sisv+Wk/1RadPLFmraRlqvJwt6Ww21LpiXqXHV2mIgq
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WnR98YgSvUi3TJHrUQiNc9YyBzuRo0AjgG2C9qiE3FM+Y28+iQ/sR3+bFs
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zYuZKVTObqiIslwXu7imO0cvvFRgJF/6u3HNFQ4LUTGhiM3FQmC6NNlF3/
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vJM2hwRDMcJqDd54Twx90Wh+tYz0z7QMsK4ANXWHHWHR0JchnLWmenzbtW
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5MHdW9AYsNJZAQSOpirE4Xi31CSlWAi9KV+cUCmWF5zOFy1x23P6PjdaRm
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4T2zw4dxS5NswXWU0sVEXxjs6PYxuIiCTL7vdpx8QjBkrPWDrAbcMyBr2O
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host = foo.example.org
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fingerprint = 3e393aeaefb84c7e89e2f547b3a107558fca3a27
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secfile = /etc/mandos/bar-secret.txt.asc