Man Linux: Main Page and Category List


       mandos-clients.conf - Configuration file for the Mandos server




       The file /etc/mandos/clients.conf is a configuration file for
       mandos(8), read by it at startup. The file needs to list all clients
       that should be able to use the service. All clients listed will be
       regarded as valid, even if a client was declared invalid in a previous
       run of the server.

       The format starts with a [section header] which is either [DEFAULT] or
       [client name]. The client name can be anything, and is not tied to a
       host name. Following the section header is any number of "option=value"
       entries, with continuations in the style of RFC 822.  "option: value"
       is also accepted. Note that leading whitespace is removed from values.
       Values can contain format strings which refer to other values in the
       same section, or values in the "DEFAULT" section (see the section
       called "EXPANSION"). Lines beginning with "#" or ";" are ignored and
       may be used to provide comments.


       Note: all option values are subject to start time expansion, see the
       section called "EXPANSION".

       Unknown options are ignored. The used options are as follows:

       timeout = TIME
           This option is optional.

           The timeout is how long the server will wait (for either a
           successful checker run or a client receiving its secret) until a
           client is considered invalid - that is, ineligible to get the data
           this server holds. By default Mandos will use 1 hour.

           The TIME is specified as a space-separated number of values, each
           of which is a number and a one-character suffix. The suffix must be
           one of "d", "s", "m", "h", and "w" for days, seconds, minutes,
           hours, and weeks, respectively. The values are added together to
           give the total time value, so all of "330s", "110s 110s 110s", and
           "5m 30s" will give a value of five minutes and thirty seconds.

       interval = TIME
           This option is optional.

           How often to run the checker to confirm that a client is still up.
           Note: a new checker will not be started if an old one is still
           running. The server will wait for a checker to complete until the
           above "timeout" occurs, at which time the client will be marked
           invalid, and any running checker killed. The default interval is 5

           The format of TIME is the same as for timeout above.

       checker = COMMAND
           This option is optional.

           This option allows you to override the default shell command that
           the server will use to check if the client is still up. Any output
           of the command will be ignored, only the exit code is checked: If
           the exit code of the command is zero, the client is considered up.
           The command will be run using "/bin/sh -c", so PATH will be
           searched. The default value for the checker command is "fping -q --

           In addition to normal start time expansion, this option will also
           be subject to runtime expansion; see the section called

       fingerprint = HEXSTRING
           This option is required.

           This option sets the OpenPGP fingerprint that identifies the public
           key that clients authenticate themselves with through TLS. The
           string needs to be in hexidecimal form, but spaces or upper/lower
           case are not significant.

       secret = BASE64_ENCODED_DATA
           If this option is not specified, the secfile option is required to
           be present.

           If present, this option must be set to a string of base64-encoded
           binary data. It will be decoded and sent to the client matching the
           above fingerprint. This should, of course, be OpenPGP encrypted
           data, decryptable only by the client. The program mandos-keygen(8)
           can, using its --password option, be used to generate this, if

           Note: this value of this option will probably be very long. A
           useful feature to avoid having unreadably-long lines is that a line
           beginning with white space adds to the value of the previous line,
           RFC 822-style.

       secfile = FILENAME
           This option is only used if secret is not specified, in which case
           this option is required.

           Similar to the secret, except the secret data is in an external
           file. The contents of the file should not be base64-encoded, but
           will be sent to clients verbatim.

           File names of the form ~user/foo/bar and $ENVVAR/foo/bar are

       host = STRING
           This option is optional, but highly recommended unless the checker
           option is modified to a non-standard value without "%%(host)s" in

           Host name for this client. This is not used by the server directly,
           but can be, and is by default, used by the checker. See the checker


       There are two forms of expansion: Start time expansion and runtime

       Any string in an option value of the form "%(foo)s" will be replaced by
       the value of the option foo either in the same section, or, if it does
       not exist there, the [DEFAULT] section. This is done at start time,
       when the configuration file is read.

       Note that this means that, in order to include an actual percent
       character ("%") in an option value, two percent characters in a row
       ("%%") must be entered.

       This is currently only done for the checker option.

       Any string in an option value of the form "%%(foo)s" will be replaced
       by the value of the attribute foo of the internal "Client" object. See
       the source code for details, and let the authors know of any attributes
       that are useful so they may be preserved to any new versions of this

       Note that this means that, in order to include an actual percent
       character ("%") in a checker option, four percent characters in a row
       ("%%%%") must be entered. Also, a bad format here will lead to an
       immediate but silent run-time fatal exit; debug mode is needed to
       expose an error of this kind.


       The file described here is /etc/mandos/clients.conf


       The format for specifying times for timeout and interval is not very

       The difference between %%(foo)s and %(foo)s is obscure.


           timeout = 1h
           interval = 5m
           checker = fping -q -- %%(host)s

           # Client "foo"
           fingerprint =  7788 2722 5BA7 DE53 9C5A  7CFA 59CF F7CD BD9A 5920
           secret =
           host =
           interval = 1m

           # Client "bar"
           fingerprint = 3e393aeaefb84c7e89e2f547b3a107558fca3a27
           secfile = /etc/mandos/bar-secret
           timeout = 15m


       mandos-keygen(8), mandos.conf(5), mandos(8)


       Copyright (C) 2008-2009 Teddy Hogeborn, Bjorn Pahlsson

       This manual page is free software: you can redistribute it and/or
       modify it under the terms of the GNU General Public License as
       published by the Free Software Foundation, either version 3 of the
       License, or (at your option) any later version.

       This manual page is distributed in the hope that it will be useful, but
       WITHOUT ANY WARRANTY; without even the implied warranty of
       General Public License for more details.

       You should have received a copy of the GNU General Public License along
       with this program. If not, see