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 difficult, as there will be many independent sessions with the same AcctSession-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
AUTHORS
- Chris Parker, cparker@segv.org