rlm_acct_unique(5)						 FreeRADIUS Module						rlm_acct_unique(5)

NAME

       rlm_acct_unique - FreeRADIUS Module

DESCRIPTION

       The rlm_acct_unique module creates a unique accounting session Id.

       Many  NAS  vendors have their equipment supply an Acct-Session-Id attribute which is not unique over reboots.  This makes accounting diffi-
       cult, as there will be many independent sessions with the same Acct-Session-Id attribute.  This module uses the Acct-Session-Id	attribute,
       along with other attributes in the request, to create a more unique session ID, called Acct-Unique-Session-Id.

       The main configuration items to be aware of are:

       key    A list of the attributes used in calculating an MD5 hash which is used as the value for the unique session id.

CONFIGURATION

       modules {
	 ...
	 acct_unique {
	    key = "User-Name, Acct-Session-Id, NAS-IP-Address, NAS-Port"
	 }
	 ...
       }
	...
       preacct {
	 ...
	 acct_unique
	 ...
       }

       After  generating  the MD5 hash, the module adds it to the accounting request packet received from the client.  It will look something like
       this in your detail file:

	    Acct-Unique-Session-Id = "c66ef57e480b9d26"

       NOTE:  Any attribute you specify that is not found in the 'dictionary' file will cause the server to fail and exit with an error.

       NOTE:  If you want the Acct-Unique-Session-Id of the Start and the Stop packet of a particular session to match, you must  use  values  for
       the key that will stay the same for the Start and Stop.	The above example is a good start.  Adding 'Acct-Session-Time', for example, would
       cause a mismatch because that value is not the same on the Start and Stop accounting packets.

SECTIONS

       authorization, pre-accounting, accounting

FILES

       /etc/raddb/radiusd.conf

SEE ALSO

       radiusd(8), radiusd.conf(5)

AUTHORS

       Chris Parker, cparker@segv.org

								  3 February 2004						rlm_acct_unique(5)