NAME

       rlm_counter - FreeRADIUS Module

DESCRIPTION

       The  rlm_counter  module provides a general framework to allow access based on accumulated
       usage of a resource, such as total time online in a given period, total  data  transferred
       in  a  given  period,  etc.  This is very useful in a 'Prepaid Service' situation, where a
       user has paid for a finite amount of usage and should not be allowed to use more than that
       service.   Collection,  monitoring,  and  replenishment of prepaid services are beyond the
       scope of this module.

       The main configuration items to be aware of are:

       filename
              The filename where the usage data is stored.

       key    An attribute which will be present in the Access-Request to be used as the  'index'
              value  for  the  counter. A counter entry is tracked for each unique key.  The most
              likely key you will want to use is User-Name.

       count_attribute
              An attribute which will be used to increment the counter value.  If this  attribute
              is  Acct-Session-Time  or  an  integer value the counter data is incremented by the
              Attribute value.  For all other attribute types the counter is incremented by one.

       reset  How frequently the counter data should be set back to 0.   Valid  values  for  this
              variable are: hourly, daily, weekly, monthly, ornever Alternatively, it can be user
              defined, in the form: num[hdwm].  num is a numeric value, followed by one  or  none
              of the following letters.  h: hours, d: days, w: weeks, m: months.

       check_name
              This  defines  an attribute name which will be registered by the counter module and
              can be used to set the maximum allowed value for the counter after which  the  user
              is rejected.  If Daily-Session-Time is set, you can use the following syntax in the
              Users file to set a cap of 3600 seconds ( 8 hours ):

       DEFAULT Max-Daily-Session := 3600

       reply_name
              This is the name of the attribute which will contain the remaining  value  for  the
              counter  in  the reply packet when the user is successfully authorized. The default
              attribute name is "Session-Timeout".

       allowed_service_type
              This can be used to only  apply  the  limitations  to  specific  service  types  of
              sessions.   For  example,  setting  this to Framed-User will only apply the counter
              module to Framed sessions, excluding other types such as Telnet or Rlogin.

       cache_size
              The maximum size of the cache to be used by the module.  The default is 1000.

NOTES

       This module registers an attribute, so it should be added to the instantiate  section,  to
       be  called  on server startup.  When used in the authorize section, it must come after any
       modules which set the 'check_name' attribute.

SECTIONS

       instantiate, authorize, accounting

FILES

       /etc/freeradius/3.0/radiusd.conf

SEE ALSO

       radiusd(8), radiusd.conf(5) rlm_sqlcounter(5)

AUTHOR

       Chris Parker, cparker@segv.org

                                          13 March 2004                            rlm_counter(5)