Merge pull request #54 from mcnewton/patch-client-cert

[freeradius.git] / raddb / radiusd.conf.in

# -*- text -*-
##
## radiusd.conf -- FreeRADIUS server configuration file - @RADIUSD_VERSION@
##
##      http://www.freeradius.org/
##      $Id$
##

######################################################################
#
#       Read "man radiusd" before editing this file.  See the section
#       titled DEBUGGING.  It outlines a method where you can quickly
#       obtain the configuration you want, without running into
#       trouble.
#
#       Run the server in debugging mode, and READ the output.
#
#               $ radiusd -X
#
#       We cannot emphasize this point strongly enough.  The vast
#       majority of problems can be solved by carefully reading the
#       debugging output, which includes warnings about common issues,
#       and suggestions for how they may be fixed.
#
#       There may be a lot of output, but look carefully for words like:
#       "warning", "error", "reject", or "failure".  The messages there
#       will usually be enough to guide you to a solution.
#
#       If you are going to ask a question on the mailing list, then
#       explain what you are trying to do, and include the output from
#       debugging mode (radiusd -X).  Failure to do so means that all
#       of the responses to your question will be people telling you
#       to "post the output of radiusd -X".

######################################################################
#
#       The location of other config files and logfiles are declared
#       in this file.
#
#       Also general configuration for modules can be done in this
#       file, it is exported through the API to modules that ask for
#       it.
#
#       See "man radiusd.conf" for documentation on the format of this
#       file.  Note that the individual configuration items are NOT
#       documented in that "man" page.  They are only documented here,
#       in the comments.
#
#       As of 2.0.0, FreeRADIUS supports a simple processing language
#       in the "authorize", "authenticate", "accounting", etc. sections.
#       See "man unlang" for details.
#

prefix = @prefix@
exec_prefix = @exec_prefix@
sysconfdir = @sysconfdir@
localstatedir = @localstatedir@
sbindir = @sbindir@
logdir = @logdir@
raddbdir = @raddbdir@
radacctdir = @radacctdir@

#
#  name of the running server.  See also the "-n" command-line option.
name = radiusd

#  Location of config and logfiles.
confdir = ${raddbdir}
certdir = ${confdir}/certs
cadir   = ${confdir}/certs
run_dir = ${localstatedir}/run/${name}

# Should likely be ${localstatedir}/lib/radiusd
db_dir = ${raddbdir}

#
# libdir: Where to find the rlm_* modules.
#
#   This should be automatically set at configuration time.
#
#   If the server builds and installs, but fails at execution time
#   with an 'undefined symbol' error, then you can use the libdir
#   directive to work around the problem.
#
#   The cause is usually that a library has been installed on your
#   system in a place where the dynamic linker CANNOT find it.  When
#   executing as root (or another user), your personal environment MAY
#   be set up to allow the dynamic linker to find the library.  When
#   executing as a daemon, FreeRADIUS MAY NOT have the same
#   personalized configuration.
#
#   To work around the problem, find out which library contains that symbol,
#   and add the directory containing that library to the end of 'libdir',
#   with a colon separating the directory names.  NO spaces are allowed.
#
#   e.g. libdir = /usr/local/lib:/opt/package/lib
#
#   You can also try setting the LD_LIBRARY_PATH environment variable
#   in a script which starts the server.
#
#   If that does not work, then you can re-configure and re-build the
#   server to NOT use shared libraries, via:
#
#       ./configure --disable-shared
#       make
#       make install
#
libdir = @libdir@

#  pidfile: Where to place the PID of the RADIUS server.
#
#  The server may be signalled while it's running by using this
#  file.
#
#  This file is written when ONLY running in daemon mode.
#
#  e.g.:  kill -HUP `cat /var/run/radiusd/radiusd.pid`
#
pidfile = ${run_dir}/${name}.pid

#  max_request_time: The maximum time (in seconds) to handle a request.
#
#  Requests which take more time than this to process may be killed, and
#  a REJECT message is returned.
#
#  WARNING: If you notice that requests take a long time to be handled,
#  then this MAY INDICATE a bug in the server, in one of the modules
#  used to handle a request, OR in your local configuration.
#
#  This problem is most often seen when using an SQL database.  If it takes
#  more than a second or two to receive an answer from the SQL database,
#  then it probably means that you haven't indexed the database.  See your
#  SQL server documentation for more information.
#
#  Useful range of values: 5 to 120
#
max_request_time = 30

#  cleanup_delay: The time to wait (in seconds) before cleaning up
#  a reply which was sent to the NAS.
#
#  The RADIUS request is normally cached internally for a short period
#  of time, after the reply is sent to the NAS.  The reply packet may be
#  lost in the network, and the NAS will not see it.  The NAS will then
#  re-send the request, and the server will respond quickly with the
#  cached reply.
#
#  If this value is set too low, then duplicate requests from the NAS
#  MAY NOT be detected, and will instead be handled as seperate requests.
#
#  If this value is set too high, then the server will cache too many
#  requests, and some new requests may get blocked.  (See 'max_requests'.)
#
#  Useful range of values: 2 to 10
#
cleanup_delay = 5

#  max_requests: The maximum number of requests which the server keeps
#  track of.  This should be 256 multiplied by the number of clients.
#  e.g. With 4 clients, this number should be 1024.
#
#  If this number is too low, then when the server becomes busy,
#  it will not respond to any new requests, until the 'cleanup_delay'
#  time has passed, and it has removed the old requests.
#
#  If this number is set too high, then the server will use a bit more
#  memory for no real benefit.
#
#  If you aren't sure what it should be set to, it's better to set it
#  too high than too low.  Setting it to 1000 per client is probably
#  the highest it should be.
#
#  Useful range of values: 256 to infinity
#
max_requests = 1024

#  listen: Make the server listen on a particular IP address, and send
#  replies out from that address. This directive is most useful for
#  hosts with multiple IP addresses on one interface.
#
#  If you want the server to listen on additional addresses, or on
#  additionnal ports, you can use multiple "listen" sections.
#
#  Each section make the server listen for only one type of packet,
#  therefore authentication and accounting have to be configured in
#  different sections.
#
#  The server ignore all "listen" section if you are using '-i' and '-p'
#  on the command line.
#
listen {
        #  Type of packets to listen for.
        #  Allowed values are:
        #       auth    listen for authentication packets
        #       acct    listen for accounting packets
        #       proxy   IP to use for sending proxied packets
        #       detail  Read from the detail file.  For examples, see
        #               raddb/sites-available/copy-acct-to-home-server
        #       status  listen for Status-Server packets.  For examples,
        #               see raddb/sites-available/status
        #       coa     listen for CoA-Request and Disconnect-Request
        #               packets.  For examples, see the file
        #               raddb/sites-available/coa-server
        #
        type = auth

        #  Note: "type = proxy" lets you control the source IP used for
        #        proxying packets, with some limitations:
        #
        #    * A proxy listener CANNOT be used in a virtual server section.
        #    * You should probably set "port = 0".
        #    * Any "clients" configuration will be ignored.
        #
        #  See also proxy.conf, and the "src_ipaddr" configuration entry
        #  in the sample "home_server" section.  When you specify the
        #  source IP address for packets sent to a home server, the
        #  proxy listeners are automatically created.

        #  IP address on which to listen.
        #  Allowed values are:
        #       dotted quad (1.2.3.4)
        #       hostname    (radius.example.com)
        #       wildcard    (*)
        ipaddr = *

        #  OR, you can use an IPv6 address, but not both
        #  at the same time.
#       ipv6addr = ::   # any.  ::1 == localhost

        #  Port on which to listen.
        #  Allowed values are:
        #       integer port number (1812)
        #       0 means "use /etc/services for the proper port"
        port = 0

        #  Some systems support binding to an interface, in addition
        #  to the IP address.  This feature isn't strictly necessary,
        #  but for sites with many IP addresses on one interface,
        #  it's useful to say "listen on all addresses for eth0".
        #
        #  If your system does not support this feature, you will
        #  get an error if you try to use it.
        #
#       interface = eth0

        #  Per-socket lists of clients.  This is a very useful feature.
        #
        #  The name here is a reference to a section elsewhere in
        #  radiusd.conf, or clients.conf.  Having the name as
        #  a reference allows multiple sockets to use the same
        #  set of clients.
        #
        #  If this configuration is used, then the global list of clients
        #  is IGNORED for this "listen" section.  Take care configuring
        #  this feature, to ensure you don't accidentally disable a
        #  client you need.
        #
        #  See clients.conf for the configuration of "per_socket_clients".
        #
#       clients = per_socket_clients

        #
        #  Connection limiting for sockets with "proto = tcp".
        #
        #  This section is ignored for other kinds of sockets.
        #
        limit {
              #
              #  Limit the number of simultaneous TCP connections to the socket
              #
              #  The default is 16.
              #  Setting this to 0 means "no limit"
              max_connections = 16

              #  The per-socket "max_requests" option does not exist.

              #
              #  The lifetime, in seconds, of a TCP connection.  After
              #  this lifetime, the connection will be closed.
              #
              #  Setting this to 0 means "forever".
              lifetime = 0

              #
              #  The idle timeout, in seconds, of a TCP connection.
              #  If no packets have been received over the connection for
              #  this time, the connection will be closed.
              #
              #  Setting this to 0 means "no timeout".
              #
              #  We STRONGLY RECOMMEND that you set an idle timeout.
              #
              idle_timeout = 30
        }
}

#  This second "listen" section is for listening on the accounting
#  port, too.
#
listen {
        ipaddr = *
#       ipv6addr = ::
        port = 0
        type = acct
#       interface = eth0
#       clients = per_socket_clients

        #  The number of packets received can be rate limited via the
        #  "max_pps" configuration item.  When it is set, the server
        #  tracks the total number of packets received in the previous
        #  second.  If the count is greater than "max_pps", then the
        #  new packet is silently discarded.  This helps the server
        #  deal with overload situations.
        #
        #  The packets/s counter is tracked in a sliding window.  This
        #  means that the pps calculation is done for the second
        #  before the current packet was received.  NOT for the current
        #  wall-clock second, and NOT for the previous wall-clock second.
        #
        #  Useful values are 0 (no limit), or 100 to 10000.
        #  Values lower than 100 will likely cause the server to ignore
        #  normal traffic.  Few systems are capable of handling more than
        #  10K packets/s.
        #
        #  It is most useful for accounting systems.  Set it to 50%
        #  more than the normal accounting load, and you can be sure that
        #  the server will never get overloaded
        #  
#       max_pps = 0
}

#  hostname_lookups: Log the names of clients or just their IP addresses
#  e.g., www.freeradius.org (on) or 206.47.27.232 (off).
#
#  The default is 'off' because it would be overall better for the net
#  if people had to knowingly turn this feature on, since enabling it
#  means that each client request will result in AT LEAST one lookup
#  request to the nameserver.   Enabling hostname_lookups will also
#  mean that your server may stop randomly for 30 seconds from time
#  to time, if the DNS requests take too long.
#
#  Turning hostname lookups off also means that the server won't block
#  for 30 seconds, if it sees an IP address which has no name associated
#  with it.
#
#  allowed values: {no, yes}
#
hostname_lookups = no

#
#  Logging section.  The various "log_*" configuration items
#  will eventually be moved here.
#
log {
        #
        #  Destination for log messages.  This can be one of:
        #
        #       files - log to "file", as defined below.
        #       syslog - to syslog (see also the "syslog_facility", below.
        #       stdout - standard output
        #       stderr - standard error.
        #
        #  The command-line option "-X" over-rides this option, and forces
        #  logging to go to stdout.
        #
        destination = files

        #
        #  The logging messages for the server are appended to the
        #  tail of this file if destination == "files"
        #
        #  If the server is running in debugging mode, this file is
        #  NOT used.
        #
        file = ${logdir}/radius.log

        #
        #  If this configuration parameter is set, then log messages for
        #  a *request* go to this file, rather than to radius.log.
        #
        #  i.e. This is a log file per request, once the server has accepted
        #  the request as being from a valid client.  Messages that are
        #  not associated with a request still go to radius.log.
        #
        #  Not all log messages in the server core have been updated to use
        #  this new internal API.  As a result, some messages will still
        #  go to radius.log.  Please submit patches to fix this behavior.
        #
        #  The file name is expanded dynamically.  You should ONLY user
        #  server-side attributes for the filename (e.g. things you control).
        #  Using this feature MAY also slow down the server substantially,
        #  especially if you do thinks like SQL calls as part of the
        #  expansion of the filename.
        #
        #  The name of the log file should use attributes that don't change
        #  over the lifetime of a request, such as User-Name,
        #  Virtual-Server or Packet-Src-IP-Address.  Otherwise, the log
        #  messages will be distributed over multiple files.
        #
        #  Logging can be enabled for an individual request by a special
        #  dynamic expansion macro:  %{debug: 1}, where the debug level
        #  for this request is set to '1' (or 2, 3, etc.).  e.g.
        #
        #       ...
        #       update control {
        #              Tmp-String-0 = "%{debug:1}"
        #       }
        #       ...
        #
        #  The attribute that the value is assigned to is unimportant,
        #  and should be a "throw-away" attribute with no side effects.
        #
        #requests = ${logdir}/radiusd-%{%{Virtual-Server}:-DEFAULT}-%Y%m%d.log

        #
        #  Which syslog facility to use, if ${destination} == "syslog"
        #
        #  The exact values permitted here are OS-dependent.  You probably
        #  don't want to change this.
        #
        syslog_facility = daemon

        #  Log the full User-Name attribute, as it was found in the request.
        #
        # allowed values: {no, yes}
        #
        stripped_names = no

        #  Log authentication requests to the log file.
        #
        #  allowed values: {no, yes}
        #
        auth = no

        #  Log passwords with the authentication requests.
        #  auth_badpass  - logs password if it's rejected
        #  auth_goodpass - logs password if it's correct
        #
        #  allowed values: {no, yes}
        #
        auth_badpass = no
        auth_goodpass = no

        #  Log additional text at the end of the "Login OK" messages.
        #  for these to work, the "auth" and "auth_goopass" or "auth_badpass"
        #  configurations above have to be set to "yes".
        #
        #  The strings below are dynamically expanded, which means that
        #  you can put anything you want in them.  However, note that
        #  this expansion can be slow, and can negatively impact server
        #  performance.
        #
#       msg_goodpass = ""
#       msg_badpass = ""
}

#  The program to execute to do concurrency checks.
checkrad = ${sbindir}/checkrad

# SECURITY CONFIGURATION
#
#  There may be multiple methods of attacking on the server.  This
#  section holds the configuration items which minimize the impact
#  of those attacks
#
security {
        #  chroot: directory where the server does "chroot".
        #
        #  The chroot is done very early in the process of starting
        #  the server.  After the chroot has been performed it
        #  switches to the "user" listed below (which MUST be
        #  specified).  If "group" is specified, it switches to that
        #  group, too.  Any other groups listed for the specified
        #  "user" in "/etc/group" are also added as part of this
        #  process.
        #
        #  The current working directory (chdir / cd) is left
        #  *outside* of the chroot until all of the modules have been
        #  initialized.  This allows the "raddb" directory to be left
        #  outside of the chroot.  Once the modules have been
        #  initialized, it does a "chdir" to ${logdir}.  This means
        #  that it should be impossible to break out of the chroot.
        #
        #  If you are worried about security issues related to this
        #  use of chdir, then simply ensure that the "raddb" directory
        #  is inside of the chroot, end be sure to do "cd raddb"
        #  BEFORE starting the server.
        #
        #  If the server is statically linked, then the only files
        #  that have to exist in the chroot are ${run_dir} and
        #  ${logdir}.  If you do the "cd raddb" as discussed above,
        #  then the "raddb" directory has to be inside of the chroot
        #  directory, too.
        #
#       chroot = /path/to/chroot/directory

        # user/group: The name (or #number) of the user/group to run radiusd as.
        #
        #   If these are commented out, the server will run as the
        #   user/group that started it.  In order to change to a
        #   different user/group, you MUST be root ( or have root
        #   privleges ) to start the server.
        #
        #   We STRONGLY recommend that you run the server with as few
        #   permissions as possible.  That is, if you're not using
        #   shadow passwords, the user and group items below should be
        #   set to radius'.
        #
        #  NOTE that some kernels refuse to setgid(group) when the
        #  value of (unsigned)group is above 60000; don't use group
        #  "nobody" on these systems!
        #
        #  On systems with shadow passwords, you might have to set
        #  'group = shadow' for the server to be able to read the
        #  shadow password file.  If you can authenticate users while
        #  in debug mode, but not in daemon mode, it may be that the
        #  debugging mode server is running as a user that can read
        #  the shadow info, and the user listed below can not.
        #
        #  The server will also try to use "initgroups" to read
        #  /etc/groups.  It will join all groups where "user" is a
        #  member.  This can allow for some finer-grained access
        #  controls.
        #
#       user = radius
#       group = radius

        #  Core dumps are a bad thing.  This should only be set to
        #  'yes' if you're debugging a problem with the server.
        #
        #  allowed values: {no, yes}
        #
        allow_core_dumps = no

        #
        #  max_attributes: The maximum number of attributes
        #  permitted in a RADIUS packet.  Packets which have MORE
        #  than this number of attributes in them will be dropped.
        #
        #  If this number is set too low, then no RADIUS packets
        #  will be accepted.
        #
        #  If this number is set too high, then an attacker may be
        #  able to send a small number of packets which will cause
        #  the server to use all available memory on the machine.
        #
        #  Setting this number to 0 means "allow any number of attributes"
        max_attributes = 200

        #
        #  reject_delay: When sending an Access-Reject, it can be
        #  delayed for a few seconds.  This may help slow down a DoS
        #  attack.  It also helps to slow down people trying to brute-force
        #  crack a users password.
        #
        #  Setting this number to 0 means "send rejects immediately"
        #
        #  If this number is set higher than 'cleanup_delay', then the
        #  rejects will be sent at 'cleanup_delay' time, when the request
        #  is deleted from the internal cache of requests.
        #
        #  Useful ranges: 1 to 5
        reject_delay = 1

        #
        #  status_server: Whether or not the server will respond
        #  to Status-Server requests.
        #
        #  When sent a Status-Server message, the server responds with
        #  an Access-Accept or Accounting-Response packet.
        #
        #  This is mainly useful for administrators who want to "ping"
        #  the server, without adding test users, or creating fake
        #  accounting packets.
        #
        #  It's also useful when a NAS marks a RADIUS server "dead".
        #  The NAS can periodically "ping" the server with a Status-Server
        #  packet.  If the server responds, it must be alive, and the
        #  NAS can start using it for real requests.
        #
        #  See also raddb/sites-available/status
        #
        status_server = yes
}

# PROXY CONFIGURATION
#
#  proxy_requests: Turns proxying of RADIUS requests on or off.
#
#  The server has proxying turned on by default.  If your system is NOT
#  set up to proxy requests to another server, then you can turn proxying
#  off here.  This will save a small amount of resources on the server.
#
#  If you have proxying turned off, and your configuration files say
#  to proxy a request, then an error message will be logged.
#
#  To disable proxying, change the "yes" to "no", and comment the
#  $INCLUDE line.
#
#  allowed values: {no, yes}
#
proxy_requests  = yes
$INCLUDE proxy.conf


# CLIENTS CONFIGURATION
#
#  Client configuration is defined in "clients.conf".  
#

#  The 'clients.conf' file contains all of the information from the old
#  'clients' and 'naslist' configuration files.  We recommend that you
#  do NOT use 'client's or 'naslist', although they are still
#  supported.
#
#  Anything listed in 'clients.conf' will take precedence over the
#  information from the old-style configuration files.
#
$INCLUDE clients.conf


# THREAD POOL CONFIGURATION
#
#  The thread pool is a long-lived group of threads which
#  take turns (round-robin) handling any incoming requests.
#
#  You probably want to have a few spare threads around,
#  so that high-load situations can be handled immediately.  If you
#  don't have any spare threads, then the request handling will
#  be delayed while a new thread is created, and added to the pool.
#
#  You probably don't want too many spare threads around,
#  otherwise they'll be sitting there taking up resources, and
#  not doing anything productive.
#
#  The numbers given below should be adequate for most situations.
#
thread pool {
        #  Number of servers to start initially --- should be a reasonable
        #  ballpark figure.
        start_servers = 5

        #  Limit on the total number of servers running.
        #
        #  If this limit is ever reached, clients will be LOCKED OUT, so it
        #  should NOT BE SET TOO LOW.  It is intended mainly as a brake to
        #  keep a runaway server from taking the system with it as it spirals
        #  down...
        #
        #  You may find that the server is regularly reaching the
        #  'max_servers' number of threads, and that increasing
        #  'max_servers' doesn't seem to make much difference.
        #
        #  If this is the case, then the problem is MOST LIKELY that
        #  your back-end databases are taking too long to respond, and
        #  are preventing the server from responding in a timely manner.
        #
        #  The solution is NOT do keep increasing the 'max_servers'
        #  value, but instead to fix the underlying cause of the
        #  problem: slow database, or 'hostname_lookups=yes'.
        #
        #  For more information, see 'max_request_time', above.
        #
        max_servers = 32

        #  Server-pool size regulation.  Rather than making you guess
        #  how many servers you need, FreeRADIUS dynamically adapts to
        #  the load it sees, that is, it tries to maintain enough
        #  servers to handle the current load, plus a few spare
        #  servers to handle transient load spikes.
        #
        #  It does this by periodically checking how many servers are
        #  waiting for a request.  If there are fewer than
        #  min_spare_servers, it creates a new spare.  If there are
        #  more than max_spare_servers, some of the spares die off.
        #  The default values are probably OK for most sites.
        #
        min_spare_servers = 3
        max_spare_servers = 10

        #  When the server receives a packet, it places it onto an
        #  internal queue, where the worker threads (configured above)
        #  pick it up for processing.  The maximum size of that queue
        #  is given here.
        #
        #  When the queue is full, any new packets will be silently
        #  discarded.
        #
        #  The most common cause of the queue being full is that the
        #  server is dependent on a slow database, and it has received
        #  a large "spike" of traffic.  When that happens, there is
        #  very little you can do other than make sure the server
        #  receives less traffic, or make sure that the database can
        #  handle the load.
        #
#       max_queue_size = 65536

        #  There may be memory leaks or resource allocation problems with
        #  the server.  If so, set this value to 300 or so, so that the
        #  resources will be cleaned up periodically.
        #
        #  This should only be necessary if there are serious bugs in the
        #  server which have not yet been fixed.
        #
        #  '0' is a special value meaning 'infinity', or 'the servers never
        #  exit'
        max_requests_per_server = 0

        #  Automatically limit the number of accounting requests.
        #  This configuration item tracks how many requests per second
        #  the server can handle.  It does this by tracking the
        #  packets/s received by the server for processing, and
        #  comparing that to the packets/s handled by the child
        #  threads.
        #
        #  If the received PPS is larger than the processed PPS, *and*
        #  the queue is more than half full, then all new accounting
        #  requests are discarded.  This lowers the received rate,
        #  and over time allows the server to "catch up" to the traffic.
        #
        auto_limit_acct = no
}

# MODULE CONFIGURATION
#
#  The names and configuration of each module is located in this section.
#
#  After the modules are defined here, they may be referred to by name,
#  in other sections of this configuration file.
#
modules {
        #
        #  Each module has a configuration as follows:
        #
        #       name [ instance ] {
        #               config_item = value
        #               ...
        #       }
        #
        #  The 'name' is used to load the 'rlm_name' library
        #  which implements the functionality of the module.
        #
        #  The 'instance' is optional.  To have two different instances
        #  of a module, it first must be referred to by 'name'.
        #  The different copies of the module are then created by
        #  inventing two 'instance' names, e.g. 'instance1' and 'instance2'
        #
        #  The instance names can then be used in later configuration
        #  INSTEAD of the original 'name'.  See the 'radutmp' configuration
        #  for an example.
        #

        #
        #  As of 3.0, modules are in mods-enabled/.  Files matching
        #  the regex /[a-zA-Z0-9_.]+/ are loaded.  The modules are
        #  initialized ONLY if they are referenced in a processing
        #  section, such as authorize, authenticate, accounting,
        #  pre/post-proxy, etc.
        #
        $INCLUDE ${confdir}/mods-enabled/
}

# Instantiation
#
#  This section orders the loading of the modules.  Modules
#  listed here will get loaded BEFORE the later sections like
#  authorize, authenticate, etc. get examined.
#
#  This section is not strictly needed.  When a section like
#  authorize refers to a module, it's automatically loaded and
#  initialized.  However, some modules may not be listed in any
#  of the following sections, so they can be listed here.
#
#  Also, listing modules here ensures that you have control over
#  the order in which they are initalized.  If one module needs
#  something defined by another module, you can list them in order
#  here, and ensure that the configuration will be OK.
#
instantiate {
        #
        #  Allows the execution of external scripts.
        #  The entire command line (and output) must fit into 253 bytes.
        #
        #  e.g. Framed-Pool = `%{exec:/bin/echo foo}`
        exec

        #
        #  The expression module doesn't do authorization,
        #  authentication, or accounting.  It only does dynamic
        #  translation, of the form:
        #
        #       Session-Timeout = `%{expr:2 + 3}`
        #
        #  So the module needs to be instantiated, but CANNOT be
        #  listed in any other section.  See 'doc/rlm_expr' for
        #  more information.
        #
        expr

        #
        # We add the counter module here so that it registers
        # the check-name attribute before any module which sets
        # it
#       daily
        expiration
        logintime

        # subsections here can be thought of as "virtual" modules.
        #
        # e.g. If you have two redundant SQL servers, and you want to
        # use them in the authorize and accounting sections, you could
        # place a "redundant" block in each section, containing the
        # exact same text.  Or, you could uncomment the following
        # lines, and list "redundant_sql" in the authorize and
        # accounting sections.
        #
        #redundant redundant_sql {
        #       sql1
        #       sql2
        #}
}

######################################################################
#
#  Policies are virtual modules, similar to those defined in the
#  "instantate" section above.
#
#  Defining a policy in one of the policy.d files means that it can be
#  referenced in multiple places as a *name*, rather than as a series of
#  conditions to match, and actions to take.
#
#  Policies are something like subroutines in a normal language, but
#  they cannot be called recursively. They MUST be defined in order.
#  If policy A calls policy B, then B MUST be defined before A.
#
######################################################################
policy {
        $INCLUDE policy.d/
}

######################################################################
#
#  SNMP notificiations.  Uncomment the following line to enable
#  snmptraps.  Note that you MUST also configure the full path
#  to the "snmptrap" command in the "trigger.conf" file.
#
#$INCLUDE trigger.conf

######################################################################
#
#       Load virtual servers.
#
#       This next $INCLUDE line loads files in the directory that
#       match the regular expression: /[a-zA-Z0-9_.]+/
#
#       It allows you to define new virtual servers simply by placing
#       a file into the raddb/sites-enabled/ directory.
#
$INCLUDE sites-enabled/

######################################################################
#
#       All of the other configuration sections like "authorize {}",
#       "authenticate {}", "accounting {}", have been moved to the
#       the file:
#
#               raddb/sites-available/default
#
#       This is the "default" virtual server that has the same
#       configuration as in version 1.0.x and 1.1.x.  The default
#       installation enables this virtual server.  You should
#       edit it to create policies for your local site.
#
#       For more documentation on virtual servers, see:
#
#               raddb/sites-available/README
#
######################################################################