RE: correction radius 1.1.6 hangs 100% cpu

6 Nov 2007

      Sorry, i am running 1.1.6 not 7.

Joe
________________________________________
From: freeradius-users-bounces@lists.freeradius.org [freeradius-users-bounces@lists.freeradius.org] On Behalf Of Joe Vieira [jvieira@clarku.edu]
Sent: Tuesday, November 06, 2007 6:22 AM
To: FreeRadius users mailing list
Subject: radius 1.1.7 hangs 100% cpu

Hi,

I currently have the server in debug and am waiting to see if it fails with an actual error.  In the mean time this is what i am seeing.

rhel5-64bit freeradius 1.1.7 after about a day and a half one of the threads decides to use 100% of the CPU it's on, and nothing is logged in the normal logs from the time that starts.

my conf file is here let me know if you see a problem with it...everything WORKS, except when it hangs.....

before this started happening i changed max request time up to 60 cleanup delay to 6 max requests to 640000 as well as increased the min number of servers to 8.  i thought those changes would be pretty harmless, should i have been more careful with them?

#######CONFIG FILE ############

prefix = /usr
exec_prefix = /usr
sysconfdir = /etc/
localstatedir = /var
sbindir = /usr/sbin
logdir = ${localstatedir}/log/radius
raddbdir = ${sysconfdir}/raddb
radacctdir = ${logdir}/radacct

#  Location of config and logfiles.
confdir = ${raddbdir}
run_dir = ${localstatedir}/run/radiusd

#
#  The logging messages for the server are appended to the
#  tail of this file.
#
log_file = ${logdir}/radius.log

libdir = /usr/lib

pidfile = ${run_dir}/radiusd.pid

user = radius
group = radius

#  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.
#
#  Useful range of values: 5 to 120
#
max_request_time = 30

#  delete_blocked_requests: If the request takes MORE THAN 'max_request_time'
#  to be handled, then maybe the server should delete it.
#
#  If you're running in threaded, or thread pool mode, this setting
#  should probably be 'no'.  Setting it to 'yes' when using a threaded
#  server MAY cause the server to crash!
#
delete_blocked_requests = no

#  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 = 340000

#  It can either contain "*", or an IP address, or a fully qualified
#  Internet domain name.  The default is "*"
#
listen {
        #  IP address on which to listen.
        #  Allowed values are:
        #       dotted quad (1.2.3.4)
        #       hostname    (radius.example.com)
        #       wildcard    (*)
        ipaddr = 10.5.5.11
        #  Port on which to listen.
        #  Allowed values are:
        #       integer port number (1812)
        #       0 means "use /etc/services for the proper port"
        port = 0

        #  Type of packets to listen for.
        #  Allowed values are:
        #       auth    listen for authentication packets
        #       acct    listen for accounting packets
        #
        type = auth
}
listen {
        #  IP address on which to listen.
        #  Allowed values are:
        #       dotted quad (1.2.3.4)
        #       hostname    (radius.example.com)
        #       wildcard    (*)
        ipaddr = 10.13.13.13
        #  Port on which to listen.
        #  Allowed values are:
        #       integer port number (1812)
        #       0 means "use /etc/services for the proper port"
        port = 0

        #  Type of packets to listen for.
        #  Allowed values are:
        #       auth    listen for authentication packets
        #       acct    listen for accounting packets
        #
        type = auth
}

#  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

#  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

#  Regular expressions
#
#  These items are set at configure time.  If they're set to "yes",
#  then setting them to "no" turns off regular expression support.
#
#  If they're set to "no" at configure time, then setting them to "yes"
#  WILL NOT WORK.  It will give you an error.
#
regular_expressions     = yes
extended_expressions    = yes

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

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

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

# usercollide:  Turn "username collision" code on and off.  See the
# "doc/duplicate-users" file
#
#  WARNING
#  !!!!!!!  Setting this to "yes" may result in the server behaving
#  !!!!!!!  strangely.  The "username collision" code will ONLY work
#  !!!!!!!  with clear-text passwords.  Even then, it may not do what
#  !!!!!!!  you want, or what you expect.
#  !!!!!!!
#  !!!!!!!  We STRONGLY RECOMMEND that you do not use this feature,
#  !!!!!!!  and that you find another way of acheiving the same goal.
#  !!!!!!!
#  !!!!!!!  e,g. module fail-over.  See 'doc/configurable_failover'
#  WARNING
#
usercollide = no

# lower_user / lower_pass:
# Lower case the username/password "before" or "after"
# attempting to authenticate.
#
#  If "before", the server will first modify the request and then try
#  to auth the user.  If "after", the server will first auth using the
#  values provided by the user.  If that fails it will reprocess the
#  request after modifying it as you specify below.
#
#  This is as close as we can get to case insensitivity.  It is the
#  admin's job to ensure that the username on the auth db side is
#  *also* lowercase to make this work
#
# Default is 'no' (don't lowercase values)
# Valid values = "before" / "after" / "no"
#
lower_user = no
lower_pass = no

# nospace_user / nospace_pass:
#
#  Some users like to enter spaces in their username or password
#  incorrectly.  To save yourself the tech support call, you can
#  eliminate those spaces here:
#
# Default is 'no' (don't remove spaces)
# Valid values = "before" / "after" / "no" (explanation above)
#
nospace_user = after
nospace_pass = no

#  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 {
        #
        #  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

        #
        #  delayed_reject: 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.
        #  Normally this should be set to "no", because they're useless.
        #  See: http://www.freeradius.org/rfc/rfc2865.html#Keep-Alives
        #
        #  However, certain NAS boxes may require them.
        #
        #  When sent a Status-Server message, the server responds with
        #  an Access-Accept packet, containing a Reply-Message attribute,
        #  which is a string describing how long the server has been
        #  running.
        #
        status_server = no
}

# 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  ${confdir}/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 = 8

        #  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 = 35

        #  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 = 5
        max_spare_servers = 10

        #  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
}

# 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
        #  below for an example.
        #

        # PAP module to authenticate users based on their stored password
        #
        #  Supports multiple encryption schemes
        #  clear: Clear text
        #  crypt: Unix crypt
        #    md5: MD5 ecnryption
        #   sha1: SHA1 encryption.
        #  DEFAULT: crypt
        pap {
                encryption_scheme = md5
        }

        # CHAP module
        #
        #  To authenticate requests containing a CHAP-Password attribute.
        #
        chap {
                authtype = CHAP
        }

        #  Extensible Authentication Protocol
        #
$INCLUDE ${confdir}/eap.conf

        # Microsoft CHAP authentication
        #
        #  This module supports MS-CHAP and MS-CHAPv2 authentication.
        #  It also enforces the SMB-Account-Ctrl attribute.
        #
        mschap {
                #
                #  As of 0.9, the mschap module does NOT support
                #  reading from /etc/smbpasswd.
                #
                #  If you are using /etc/smbpasswd, see the 'passwd'
                #  module for an example of how to use /etc/smbpasswd

                # authtype value, if present, will be used
                # to overwrite (or add) Auth-Type during
                # authorization. Normally should be MS-CHAP
                authtype = MS-CHAP

                # if use_mppe is not set to no mschap will
                # add MS-CHAP-MPPE-Keys for MS-CHAPv1 and
                # MS-MPPE-Recv-Key/MS-MPPE-Send-Key for MS-CHAPv2
                #
                use_mppe = yes
                require_encryption = yes

                # require_strong always requires 128 bit key
                # encryption
                #
                require_strong = yes

                # Windows sends us a username in the form of
                # DOMAIN\user, but sends the challenge response
                # based on only the user portion.  This hack
                # corrects for that incorrect behavior.
                #
                with_ntdomain_hack = yes

                # The module can perform authentication itself, OR
                # use a Windows Domain Controller.  This configuration
                # directive tells the module to call the ntlm_auth
                # program, which will do the authentication, and return
                # the NT-Key.  Note that you MUST have "winbindd" and
                # "nmbd" running on the local machine for ntlm_auth
                # to work.  See the ntlm_auth program documentation
                # for details.
                #
                # Be VERY careful when editing the following line!
                #
                #--domain=%{mschap:NT-Domain}
                ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key --domain=%{doma
in} --username=%{mschap:User-Name} --challenge=%{mschap:Challenge:-00} --nt-resp
onse=%{mschap:NT-Response:-00}"
        }

        # Lightweight Directory Access Protocol (LDAP)
        #
        #  This module definition allows you to use LDAP for
        #  authorization and authentication (Auth-Type := LDAP)
        #
        #  See doc/rlm_ldap for description of configuration options
        #  and sample authorize{} and authenticate{} blocks

        ldap  wirlss{
                server = "erebus.clarku.edu"
                basedn = "ou=Users, dc=clarku, dc=edu "
                filter = "(uid=%{mschap:User-Name})"
                base_filter = "(objectclass=inetOrgPerson)"
                port = 389
                #access_attr = "uid"
                access_attr = "clarkuWirelessAccess"
                ldap_debug = 0x0028
                # Mapping of RADIUS dictionary attributes to LDAP
                # directory attributes.
                dictionary_mapping = ${raddbdir}/ldap.attrmap
                ldap_connections_number = 10
        }
        ldap vpn {
                server = "erebus.clarku.edu"
                basedn = "ou=Users, dc=clarku, dc=edu "
                filter = "(uid=%{mschap:User-Name})"
                base_filter = "(objectclass=inetOrgPerson)"
                port = 389
                access_attr = "clarkuVpnAccess"
                ldap_debug = 0x0028
                # Mapping of RADIUS dictionary attributes to LDAP
                # directory attributes.
                dictionary_mapping = ${raddbdir}/ldap.attrmap
                ldap_connections_number = 10
        }

         ldap machine {
                server = "erebus.clarku.edu"
                basedn = "ou=Computers, dc=clarku, dc=edu "
                filter = "(macAddress=%{Calling-Station-Id})"
                base_filter = "(objectclass=ieee802Device)"
                port = 389
                # default_profile = "cn=radprofile,ou=dialup,o=My Org,c=UA"
                # profile_attribute = "radiusProfileDn"
                access_attr = "macAddress"
                ldap_debug = 0x0028
                # Mapping of RADIUS dictionary attributes to LDAP
                # directory attributes.
                dictionary_mapping = ${raddbdir}/ldap.attrmap
                ldap_connections_number = 10
        }
        # Realm module, for proxying.
        #
        #  You can have multiple instances of the realm module to
        #  support multiple realm syntaxs at the same time.  The
        #  search order is defined by the order in the authorize and
        #  preacct sections.
        #
        #  Four config options:
        #       format         -  must be 'prefix' or 'suffix'
        #       delimiter      -  must be a single character
        #       ignore_default -  set to 'yes' or 'no'
        #       ignore_null    -  set to 'yes' or 'no'
        #
        #  ignore_default and ignore_null can be set to 'yes' to prevent
        #  the module from matching against DEFAULT or NULL realms.  This
        #  may be useful if you have have multiple instances of the
        #  realm module.
        #
        #  They both default to 'no'.
        #

        realm ntdomain {
                format = prefix
                delimiter = "\\"
                ignore_default = no
                ignore_null = no
        #  A simple value checking module
        #
        #  It can be used to check if an attribute value in the request
        #  matches a (possibly multi valued) attribute in the check
        #  items This can be used for example for caller-id
        #  authentication.  For the module to run, both the request
        #  attribute and the check items attribute must exist
        #
        #  i.e.
        #  A user has an ldap entry with 2 radiusCallingStationId
        #  attributes with values "12345678" and "12345679".  If we
        #  enable rlm_checkval, then any request which contains a
        #  Calling-Station-Id with one of those two values will be
        #  accepted.  Requests with other values for
        #  Calling-Station-Id will be rejected.
        #
        #  Regular expressions in the check attribute value are allowed
        #  as long as the operator is '=~'
        #
        checkval {
                # The attribute to look for in the request
                item-name = Calling-Station-Id

                # The attribute to look for in check items. Can be multi valued
                check-name = Calling-Station-Id

                # The data type. Can be
                # string,integer,ipaddr,date,abinary,octets
                data-type = string

                # If set to yes and we dont find the item-name attribute in the
                # request then we send back a reject
                # DEFAULT is no
                #notfound-reject = no
        }

        #  rewrite arbitrary packets.  Useful in accounting and authorization.
        #
        #
        #  The module can also use the Rewrite-Rule attribute. If it
        #  is set and matches the name of the module instance, then
        #  that module instance will be the only one which runs.
        #
        #  Also if new_attribute is set to yes then a new attribute
        #  will be created containing the value replacewith and it
        #  will be added to searchin (packet, reply, proxy, proxy_reply or confi
g).
        # searchfor,ignore_case and max_matches will be ignored in that case.
        #
        # Backreferences are supported: %{0} will contain the string the whole m
atch
        # and %{1} to %{8} will contain the contents of the 1st to the 8th paren
theses
        #
        # If max_matches is greater than one the backreferences will correspond
to the
        # first match
        attr_rewrite  stupidjunk{
                attribute = User-Name
                # may be "packet", "reply", "proxy", "proxy_reply" or "config"
                searchin = packet
                searchfor = "ad"
                replacewith = "clarku"
                ignore_case = yes
                new_attribute = no
                max_matches = 10
                ## If set to yes then the replace string will be appended to the
 original string
                append = no
        }

        # Preprocess the incoming RADIUS request, before handing it off
        # to other modules.
        #
        #  This module processes the 'huntgroups' and 'hints' files.
        #  In addition, it re-writes some weird attributes created
        #  by some NASes, and converts the attributes into a form which
        #  is a little more standard.
        #
        preprocess {
                huntgroups = ${confdir}/huntgroups
                hints = ${confdir}/hints

                # This hack changes Ascend's wierd port numberings
                # to standard 0-??? port numbers so that the "+" works
                # for IP address assignments.
                with_ascend_hack = no
                ascend_channels_per_line = 23

                # Windows NT machines often authenticate themselves as
                # NT_DOMAIN\username
                #
                # If this is set to 'yes', then the NT_DOMAIN portion
                # of the user-name is silently discarded.
                #
                # This configuration entry SHOULD NOT be used.
                # See the "realms" module for a better way to handle
                # NT domains.
                with_ntdomain_hack = no

                with_specialix_jetstream_hack = no

                # Cisco sends it's VSA attributes with the attribute
                # name *again* in the string, like:
                #
                #   H323-Attribute = "h323-attribute=value".
                #
                # If this configuration item is set to 'yes', then
                # the redundant data in the the attribute text is stripped
                # out.  The result is:
                #
                #  H323-Attribute = "value"
                #
                # If you're not running a Cisco NAS, you don't need
                # this hack.
                with_cisco_vsa_hack = no

        # Livingston-style 'users' file
        #
        files {
                # The default key attribute to use for matches.  The content
                # of this attribute is used to match the "name" of the
                # entry.
                #key = "%{Stripped-User-Name:-%{User-Name}}"

                usersfile = ${confdir}/users
                acctusersfile = ${confdir}/acct_users
                preproxy_usersfile = ${confdir}/preproxy_users

                #  If you want to use the old Cistron 'users' file
                #  with FreeRADIUS, you should change the next line
                #  to 'compat = cistron'.  You can the copy your 'users'
                #  file from Cistron.
                compat = no
        }
        # Write a detailed log of all accounting records received.
        #
        detail {
                #  Note that we do NOT use NAS-IP-Address here, as
                #  that attribute MAY BE from the originating NAS, and
                #  NOT from the proxy which actually sent us the
                #  request.  The Client-IP-Address attribute is ALWAYS
                #  the address of the client which sent us the
                #  request.
                #
                #  The following line creates a new detail file for
                #  every radius client (by IP address or hostname).
                #  In addition, a new detail file is created every
                #  day, so that the detail file doesn't have to go
                #  through a 'log rotation'
                #
                #  If your detail files are large, you may also want
                #  to add a ':%H' (see doc/variables.txt) to the end
                #  of it, to create a new detail file every hour, e.g.:
                #
                #   ..../detail-%Y%m%d:%H
                #
                #  This will create a new detail file for every hour.
                #
                detailfile = ${radacctdir}/%{Client-IP-Address}/detail-%Y%m%d

                #
                #  The Unix-style permissions on the 'detail' file.
                #
                #  The detail file often contains secret or private
                #  information about users.  So by keeping the file
                #  permissions restrictive, we can prevent unwanted
                #  people from seeing that information.
                detailperm = 0600
        }

        #
        # detail auth_log {
                # detailfile = ${radacctdir}/%{Client-IP-Address}/auth-detail-%Y
%m%d

                #
                #  This MUST be 0600, otherwise anyone can read
                #  the users passwords!
                # detailperm = 0600
        # }

        #
        #  This module logs authentication reply packets sent
        #  to a NAS.  Both Access-Accept and Access-Reject packets
        #  are logged.
        #
        #  You will also need to un-comment the 'reply_log' line
        #  in the 'post-auth' section, below.
        #
        # detail reply_log {
                # detailfile = ${radacctdir}/%{Client-IP-Address}/reply-detail-%
Y%m%d

                #
                #  This MUST be 0600, otherwise anyone can read
                #  the users passwords!
                # detailperm = 0600
        # }

        # Create a unique accounting session Id.  Many NASes re-use or
        # repeat values for Acct-Session-Id, causing no end of
        # confusion.
        #
        #  This module will add a (probably) unique session id
        #  to an accounting packet based on the attributes listed
        #  below found in the packet.  See doc/rlm_acct_unique for
        #  more information.
        #
        acct_unique {
                key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Add
ress, NAS-Port"
        }

        #  For Cisco VoIP specific accounting with Postgresql,
        #  use:         ${confdir}/pgsql-voip.conf
        #
        #  You will also need the sql schema from:
        #        src/billing/cisco_h323_db_schema-postgres.sql
        #  Note: This config can be use AS WELL AS the standard sql
        #  config if you need SQL based Auth

        #  Write a 'utmp' style file, of which users are currently
        radutmp {
                #  Where the file is stored.  It's not a log file,
                #  so it doesn't need rotating.
                #
                filename = ${logdir}/radutmp

                #  The field in the packet to key on for the
                #  'user' name,  If you have other fields which you want
                #  to use to key on to control Simultaneous-Use,
                #  then you can use them here.
                #
                #  Note, however, that the size of the field in the
                #  'utmp' data structure is small, around 32
                #  characters, so that will limit the possible choices
                #  of keys.
                #
                #  You may want instead: %{Stripped-User-Name:-%{User-Name}}
                username = %{User-Name}

                #  Whether or not we want to treat "user" the same
                #  as "USER", or "User".  Some systems have problems
                #  with case sensitivity, so this should be set to
                #  'no' to enable the comparisons of the key attribute
                #  to be case insensitive.
                #
                case_sensitive = yes

                #  Accounting information may be lost, so the user MAY
                #  have logged off of the NAS, but we haven't noticed.
                #  If so, we can verify this information with the NAS,
                #
                #  If we want to believe the 'utmp' file, then this
                #  configuration entry can be set to 'no'.
                #
                check_with_nas = yes

                # Set the file permissions, as the contents of this file
                # are usually private.
                perm = 0600

                callerid = "yes"
        }

        # "Safe" radutmp - does not contain caller ID, so it can be
        # world-readable, and radwho can work for normal users, without
        # exposing any information that isn't already exposed by who(1).
        #
        # This is another 'instance' of the radutmp module, but it is given
        # then name "sradutmp" to identify it later in the "accounting"
        # section.
        radutmp sradutmp {
                filename = ${logdir}/sradutmp
                perm = 0644
                callerid = "no"
        attr_filter {
                attrsfile = ${confdir}/attrs
        }

        # The "always" module is here for debugging purposes. Each
        # instance simply returns the same result, always, without
        # doing anything.
        always fail {
                rcode = fail
        }
        always reject {
                rcode = reject
        }
        always ok {
                rcode = ok
                simulcount = 0
                mpp = no
        }

        #
        #  The 'expression' module currently has no configuration.
        #
        #  This module is useful only for 'xlat'.  To use it,
        #  put 'exec' into the 'instantiate' section.  You can then
        #  do dynamic translation of attributes like:
        #
        #  Attribute-Name = `%{expr:2 + 3 + %{exec: uid -u}}`
        #
        #  The value of the attribute will be replaced with the output
        #  of the program which is executed.  Due to RADIUS protocol
        #  limitations, any output over 253 bytes will be ignored.
        expr {
        }

        #
        #  The 'digest' module currently has no configuration.
        #
        #  "Digest" authentication against a Cisco SIP server.
        #  See 'doc/rfc/draft-sterman-aaa-sip-00.txt' for details
        #  on performing digest authentication for Cisco SIP servers.
        #
        digest {
        }

        #
        #  Execute external programs
        #
        #  This module is useful only for 'xlat'.  To use it,
        #  put 'exec' into the 'instantiate' section.  You can then
        #  do dynamic translation of attributes like:
        #
        #  Attribute-Name = `%{exec:/path/to/program args}`
        #
        #  The value of the attribute will be replaced with the output
     #
        exec {
                wait = yes
                input_pairs = request
        }

        #
        #  Do server side ip pool management. Should be added in post-auth and
        #  accounting sections.
        #
        #  The module also requires the existance of the Pool-Name
        #  attribute. That way the administrator can add the Pool-Name
        #  attribute in the user profiles and use different pools
        #  for different users. The Pool-Name attribute is a *check* item not
        #  a reply item.
        #
        # Example:
        # radiusd.conf: ippool students { [...] }
        # users file  : DEFAULT Group == students, Pool-Name := "students"
        #
        # ********* IF YOU CHANGE THE RANGE PARAMETERS YOU MUST *********
        # ********* THEN ERASE THE DB FILES                     *********
        #
        ippool main_pool {

                #  range-start,range-stop: The start and end ip
                #  addresses for the ip pool
                range-start = 192.168.1.1
                range-stop = 192.168.3.254

                #  netmask: The network mask used for the ip's
                netmask = 255.255.255.0

                #  cache-size: The gdbm cache size for the db
                #  files. Should be equal to the number of ip's
                #  available in the ip pool
                cache-size = 800

                # session-db: The main db file used to allocate ip's to clients
                session-db = ${raddbdir}/db.ippool

                # ip-index: Helper db index file used in multilink
                ip-index = ${raddbdir}/db.ipindex

                # override: Will this ippool override a Framed-IP-Address alread
y set
                override = no

                # maximum-timeout: If not zero specifies the maximum time in sec
onds an
                # entry may be active. Default: 0
                maximum-timeout = 0
        }
        # ANSI X9.9 token support.  Not included by default.
        # $INCLUDE  ${confdir}/x99.conf

}

# 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
}

#  Authorization. First preprocess (hints and huntgroups files),
#  then realms, and finally look in the "users" file.
#
#  The order of the realm modules will determine the order that
#  we try to find a matching realm.
#
#  Make *sure* that 'preprocess' comes before any realm if you
#  need to setup hints for the remote radius server
authorize {
        #
        #  The preprocess module takes care of sanitizing some bizarre
        #  attributes in the request, and turning them into attributes
        #  which are more standard.
        #
        #  It takes care of processing the 'raddb/hints' and the
        #  'raddb/huntgroups' files.
        #
        #  It also adds the %{Client-IP-Address} attribute to the request.
        preprocess
        mschap
        eap
        #  The ldap module will set Auth-Type to LDAP if it has not
        #  already been set
        autztype VPN{
                vpn
        }
        autztype WIRELESS{
                wirlss
        }
        files
}

#  Authentication.
#
#
#  This section lists which modules are available for authentication.
#  Note that it does NOT mean 'try each module in order'.  It means
#  that a module from the 'authorize' section adds a configuration
#  attribute 'Auth-Type := FOO'.  That authentication type is then
#  used to pick the apropriate module from the list below.
#

#  In general, you SHOULD NOT set the Auth-Type attribute.  The server
#  will figure it out on its own, and will do the right thing.  The
#  most common side effect of erroneously setting the Auth-Type
#  attribute is that one authentication method will work, but the
#  others will not.
#
#  The common reasons to set the Auth-Type attribute by hand
#  is to either forcibly reject the user, or forcibly accept him.
#
authenticate {
        #  MSCHAP authentication.
        Auth-Type MS-CHAP {
                mschap
        }
        #  Allow EAP authentication
        eap
}

#
#  Pre-accounting.  Decide which accounting type to use.
#
preacct {
        preprocess

        #
        #  Ensure that we have a semi-unique identifier for every
        #  request, and many NAS boxes are broken.
        acct_unique

        #
        #  Look for IPASS-style 'realm/', and if not found, look for
        #  '@realm', and decide whether or not to proxy, based on
        #  that.
        #
        #  Accounting requests are generally proxied to the same
        #  home server as authentication requests.
#       IPASS
        ntdomain
}

#
#  Accounting.  Log the accounting data.
#
accounting {
        #
        #  Create a 'detail'ed log of the packets.
        #  Note that accounting requests which are proxied
        #  are also logged in the detail file.
        detail
        #
        #  For Simultaneous-Use tracking.
        #
        #  Due to packet losses in the network, the data here
        #  may be incorrect.  There is little we can do about it.
        radutmp
#       sradutmp

        #  Return an address to the IP Pool when we see a stop record.
#       main_pool

        #
        #  Log traffic to an SQL database.
        #
        #  See "Accounting queries" in sql.conf
#       sql

        #  Cisco VoIP specific bulk accounting
#       pgsql-voip

}

#  Session database, used for checking Simultaneous-Use. Either the radutmp
#  or rlm_sql module can handle this.
#  The rlm_sql module is *much* faster
session {
        radutmp

        #
        #  See "Simultaneous Use Checking Querie" in sql.conf
#       sql
}

#  Post-Authentication
#  Once we KNOW that the user has been authenticated, there are
#  additional steps we can take.
post-auth {
        #  Get an address from the IP Pool.
#       main_pool

        #
        #  If you want to have a log of authentication replies,
        #  un-comment the following line, and the 'detail reply_log'
        #  section, above.
#       reply_log

        #
        #  After authenticating the user, do another SQL qeury.
        #
        #  See "Authentication Logging Queries" in sql.conf
#       sql

        #
        #  Access-Reject packets are sent through the REJECT sub-section
        #  of the post-auth section.
        #
#       Post-Auth-Type REJECT {
#               insert-module-name-here
#       }

}

#
#  When the server decides to proxy a request to a home server,
#  the proxied request is first passed through the pre-proxy
#  stage.  This stage can re-write the request, or decide to
#  cancel the proxy.
#
#  Only a few modules currently have this method.
#
pre-proxy {
#       attr_rewrite

        #  If you want to have a log of packets proxied to a home
        #  server, un-comment the following line, and the
        #  'detail pre_proxy_log' section, above.
#       pre_proxy_log
}

#
#  When the server receives a reply to a request it proxied
#  to a home server, the request may be massaged here, in the
#  post-proxy stage.
#
post-proxy {
        #

        #  If you want to have a log of replies from a home server,
        #  un-comment the following line, and the 'detail post_proxy_log'
        #  section, above.
#       post_proxy_log

#       attr_rewrite

        #  Uncomment the following line if you want to filter replies from
        #  remote proxies based on the rules defined in the 'attrs' file.

#       attr_filter

        #
        #  If you are proxying LEAP, you MUST configure the EAP
        #  module, and you MUST list it here, in the post-proxy
        #  stage.
        #
        #  You MUST also use the 'nostrip' option in the 'realm'
        #  configuration.  Otherwise, the User-Name attribute
        #  in the proxied request will not match the user name
        #  hidden inside of the EAP packet, and the end server will
        #  reject the EAP request.
        #
        eap
}

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