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 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