rlm_counter(5) FreeRADIUS Module rlm_counter(5)
rlm_counter - FreeRADIUS Module
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:
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.
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.
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-Ses-
sion-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
This is the name of the attribute which will contain the remain-
ing value for the counter in the reply packet when the user is
successfully authorized. The default attribute name is "Session-
This can be used to only apply the limitations to specific ser-
vice 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.
The maximum size of the cache to be used by the module. The
default is 1000.
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-
instantiate, authorize, accounting
radiusd(8), radiusd.conf(5) rlm_sqlcounter(5)
Chris Parker, cparkerATsegv.org
13 March 2004 rlm_counter(5)