68
56
<refname><filename>&CONFNAME;</filename></refname>
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Configuration file for Mandos clients
58
Configuration file for the Mandos server
63
<synopsis>&CONFPATH;</synopsis>
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66
<refsect1 id="description">
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67
<title>DESCRIPTION</title>
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The file &CONFPATH; is the configuration file for mandos where
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each client that will be abel to use the service need to be
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specified. The configuration file is looked on at the startup of
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the service, so to reenable timedout clients one need to only
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restart the server. The format starts with a section under []
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which is eather <literal>[DEFAULT]</literal> or a client
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name. Values is set through the use of VAR = VALUE pair. Values
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<refsect1 id="default">
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<title>DEFAULTS</title>
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The paramters for <literal>[DEFAULT]</literal> are:
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<term><literal>timeout</literal></term>
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This option allows you to override the default timeout
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that clients will get. By default mandos will use 1hr.
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<term><literal>interval</literal></term>
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This option allows you to override the default interval
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used between checkups for disconnected clients. By default
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<term><literal>checker</literal></term>
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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 up if the client
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is still up. By default mandos will "fping -q -- %%(host)s"
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<refsect1 id="clients">
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<title>CLIENTS</title>
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The paramters for clients are:
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<term><literal>fingerprint</literal></term>
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This option sets the openpgp fingerprint that identifies
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the public certificate that clients authenticates themself
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through gnutls. The string need to be in hex-decimal form.
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<term><literal>secret</literal></term>
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Base 64 encoded OpenPGP encrypted password encrypted by
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the clients openpgp certificate.
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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="examples">
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<title>EXAMPLES</title>
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The file &CONFPATH; is a configuration file for <citerefentry
70
><refentrytitle>mandos</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry>, read by it at startup.
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The file needs to list all clients that should be able to use
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the service. The settings in this file can be overridden by
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runtime changes to the server, which it saves across restarts.
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(See the section called <quote>PERSISTENT STATE</quote> in
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<citerefentry><refentrytitle>mandos</refentrytitle><manvolnum
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>8</manvolnum></citerefentry>.) However, any <emphasis
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>changes</emphasis> to this file (including adding and removing
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clients) will, at startup, override changes done during runtime.
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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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<emphasis>Note:</emphasis> all option values are subject to
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start time expansion, see <xref linkend="expansion"/>.
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Unknown options are ignored. The used options are as follows:
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<term><option>approval_delay<literal> = </literal><replaceable
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>TIME</replaceable></option></term>
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This option is <emphasis>optional</emphasis>.
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How long to wait for external approval before resorting to
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use the <option>approved_by_default</option> value. The
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default is <quote>PT0S</quote>, i.e. not to wait.
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The format of <replaceable>TIME</replaceable> is the same
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as for <varname>timeout</varname> below.
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<term><option>approval_duration<literal> = </literal
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><replaceable>TIME</replaceable></option></term>
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This option is <emphasis>optional</emphasis>.
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How long an external approval lasts. The default is 1
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The format of <replaceable>TIME</replaceable> is the same
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as for <varname>timeout</varname> below.
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<term><option>approved_by_default<literal> = </literal
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>{ <literal >1</literal> | <literal>yes</literal> | <literal
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>true</literal> | <literal>on</literal> | <literal
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>0</literal> | <literal>no</literal> | <literal
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>false</literal> | <literal>off</literal> }</option></term>
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Whether to approve a client by default after
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the <option>approval_delay</option>. The default
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is <quote>True</quote>.
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<term><option>checker<literal> = </literal><replaceable
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>COMMAND</replaceable></option></term>
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This option is <emphasis>optional</emphasis>.
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This option overrides the default shell command that the
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server will use to check if the client is still up. Any
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output of the command will be ignored, only the exit code
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is checked: If the exit code of the command is zero, the
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client is considered up. 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>, so
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<varname>PATH</varname> will be searched. The default
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value for the checker command is <quote><literal
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><command>fping</command> <option>-q</option> <option
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>--</option> %%(host)s</literal></quote>. Note that
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<command>mandos-keygen</command>, when generating output
186
to be inserted into this file, normally looks for an SSH
187
server on the Mandos client, and, if it find one, outputs
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a <option>checker</option> option to check for the
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client’s key fingerprint – this is more secure against
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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
195
linkend="expansion"/>.
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<term><option>extended_timeout<literal> = </literal><replaceable
202
>TIME</replaceable></option></term>
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This option is <emphasis>optional</emphasis>.
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Extended timeout is an added timeout that is given once
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after a password has been sent successfully to a client.
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The timeout is by default longer than the normal timeout,
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and is used for handling the extra long downtime while a
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machine is booting up. Time to take into consideration
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when changing this value is file system checks and quota
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checks. The default value is 15 minutes.
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The format of <replaceable>TIME</replaceable> is the same
218
as for <varname>timeout</varname> below.
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<term><option>fingerprint<literal> = </literal
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><replaceable>HEXSTRING</replaceable></option></term>
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This option is <emphasis>required</emphasis>.
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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 hexadecimal form,
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but spaces or upper/lower case are not significant.
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<term><option><literal>host = </literal><replaceable
241
>STRING</replaceable></option></term>
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This option is <emphasis>optional</emphasis>, but highly
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<emphasis>recommended</emphasis> unless the
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<option>checker</option> option is modified to a
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non-standard value without <quote>%%(host)s</quote> in it.
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Host name for this client. This is not used by the server
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directly, but can be, and is by default, used by the
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checker. See the <option>checker</option> option.
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<term><option>interval<literal> = </literal><replaceable
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>TIME</replaceable></option></term>
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This option is <emphasis>optional</emphasis>.
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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 below
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<quote><varname>timeout</varname></quote> occurs, at which
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time the client will be disabled, and any running checker
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killed. The default interval is 2 minutes.
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The format of <replaceable>TIME</replaceable> is the same
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as for <varname>timeout</varname> below.
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<term><option>secfile<literal> = </literal><replaceable
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>FILENAME</replaceable></option></term>
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This option is only used if <option>secret</option> is not
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specified, in which case this option is
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<emphasis>required</emphasis>.
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Similar to the <option>secret</option>, except the secret
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data is in an external file. The contents of the file
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should <emphasis>not</emphasis> be base64-encoded, but
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will be sent to clients verbatim.
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File names of the form <filename>~user/foo/bar</filename>
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and <filename>$<envar>ENVVAR</envar>/foo/bar</filename>
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<term><option>secret<literal> = </literal><replaceable
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>BASE64_ENCODED_DATA</replaceable></option></term>
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If this option is not specified, the <option
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>secfile</option> option is <emphasis>required</emphasis>
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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
319
>mandos-keygen</command></refentrytitle><manvolnum
320
>8</manvolnum></citerefentry> can, using its
321
<option>--password</option> option, be used to generate
325
Note: this value of this option will probably be very
326
long. A useful feature to avoid having unreadably-long
327
lines is that a line beginning with white space adds to
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the value of the previous line, RFC 822-style.
334
<term><option>timeout<literal> = </literal><replaceable
335
>TIME</replaceable></option></term>
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This option is <emphasis>optional</emphasis>.
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The timeout is how long the server will wait, after a
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successful checker run, until a client is disabled and not
343
allowed to get the data this server holds. By default
344
Mandos will use 5 minutes. See also the
345
<option>extended_timeout</option> option.
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The <replaceable>TIME</replaceable> is specified as an RFC
349
3339 duration; for example
350
<quote><literal>P1Y2M3DT4H5M6S</literal></quote> meaning
351
one year, two months, three days, four hours, five
352
minutes, and six seconds. Some values can be omitted, see
353
RFC 3339 Appendix A for details.
359
<term><option>enabled<literal> = </literal>{ <literal
360
>1</literal> | <literal>yes</literal> | <literal>true</literal
361
> | <literal >on</literal> | <literal>0</literal> | <literal
362
>no</literal> | <literal>false</literal> | <literal
363
>off</literal> }</option></term>
366
Whether this client should be enabled by default. The
367
default is <quote>true</quote>.
375
<refsect1 id="expansion">
376
<title>EXPANSION</title>
378
There are two forms of expansion: Start time expansion and
381
<refsect2 id="start_time_expansion">
382
<title>START TIME EXPANSION</title>
384
Any string in an option value of the form
385
<quote><literal>%(<replaceable>foo</replaceable>)s</literal
386
></quote> will be replaced by the value of the option
387
<varname>foo</varname> either in the same section, or, if it
388
does not exist there, the <literal>[DEFAULT]</literal>
389
section. This is done at start time, when the configuration
393
Note that this means that, in order to include an actual
394
percent character (<quote>%</quote>) in an option value, two
395
percent characters in a row (<quote>%%</quote>) must be
399
<refsect2 id="runtime_expansion">
400
<title>RUNTIME EXPANSION</title>
402
This is currently only done for the <varname>checker</varname>
406
Any string in an option value of the form
407
<quote><literal>%%(<replaceable>foo</replaceable>)s</literal
408
></quote> will be replaced by the value of the attribute
409
<varname>foo</varname> of the internal
410
<quote><classname>Client</classname></quote> object in the
411
Mandos server. The currently allowed values for
412
<replaceable>foo</replaceable> are:
413
<quote><literal>approval_delay</literal></quote>,
414
<quote><literal>approval_duration</literal></quote>,
415
<quote><literal>created</literal></quote>,
416
<quote><literal>enabled</literal></quote>,
417
<quote><literal>expires</literal></quote>,
418
<quote><literal>fingerprint</literal></quote>,
419
<quote><literal>host</literal></quote>,
420
<quote><literal>interval</literal></quote>,
421
<quote><literal>last_approval_request</literal></quote>,
422
<quote><literal>last_checked_ok</literal></quote>,
423
<quote><literal>last_enabled</literal></quote>,
424
<quote><literal>name</literal></quote>,
425
<quote><literal>timeout</literal></quote>, and, if using
426
D-Bus, <quote><literal>dbus_object_path</literal></quote>.
427
See the source code for details. <emphasis role="strong"
428
>Currently, <emphasis>none</emphasis> of these attributes
429
except <quote><literal>host</literal></quote> are guaranteed
430
to be valid in future versions.</emphasis> Therefore, please
431
let the authors know of any attributes that are useful so they
432
may be preserved to any new versions of this software.
435
Note that this means that, in order to include an actual
436
percent character (<quote>%</quote>) in a
437
<varname>checker</varname> option, <emphasis>four</emphasis>
438
percent characters in a row (<quote>%%%%</quote>) must be
439
entered. Also, a bad format here will lead to an immediate
440
but <emphasis>silent</emphasis> run-time fatal exit; debug
441
mode is needed to expose an error of this kind.
447
<refsect1 id="files">
450
The file described here is &CONFPATH;
457
The format for specifying times for <varname>timeout</varname>
458
and <varname>interval</varname> is not very good.
461
The difference between
462
<literal>%%(<replaceable>foo</replaceable>)s</literal> and
463
<literal>%(<replaceable>foo</replaceable>)s</literal> is
466
<xi:include href="bugs.xml"/>
469
<refsect1 id="example">
470
<title>EXAMPLE</title>
210
471
<informalexample>
215
476
checker = fping -q -- %%(host)s
218
480
fingerprint = 7788 2722 5BA7 DE53 9C5A 7CFA 59CF F7CD BD9A 5920
221
482
hQIOA6QdEjBs2L/HEAf/TCyrDe5Xnm9esa+Pb/vWF9CUqfn4srzVgSu234
222
483
REJMVv7lBSrPE2132Lmd2gqF1HeLKDJRSVxJpt6xoWOChGHg+TMyXDxK+N