How to get accounting data from freeRadius server using freeradius client

Phil Mayers p.mayers at
Sat Jan 16 18:35:40 CET 2010

Rahul Panwar wrote:
> Thanks for a quick response,
>  > You can't. FreeRadius has no such facility.
>  > Use a database server, or write a script process the radacct file. 
> You can put accounting into both the radacct & database if you want.
> What is the use of Acct-Interim-Interval? Is it not possible to get the 
> update using this? Is it the received from radius server as a 
> Authentication/Accounting response? or NAS has to send it as a request?

Acct-Interim-Interval is a value, sent from the radius server to the 
NAS, in the authentication response.

It instructs the NAS to send interim accounting packets to the radius 
server, at the interval given. For example:

NAS: access-reqest
Srv: access-accept Acct-Interim-Interval = 300 (5 minutes)
NAS: Accounting-Start
<300 second gap>
NAS: Accoounting-Alive inbytes=10000 outbytes=10000
<300 seconds gap>
NAS: Accoounting-Alive inbytes=20000 outbytes=20000


NAS: Accounting-Stop

If the radius server doesn't give Acct-Interim-Interval, the NAS may 
have a default value, or may not send interim accounting at all.

To repeat the answer to your original question: there is no mechanism in 
radius (or extension in FreeRadius) for a NAS to query a radius server 
for accounting.

Accounting is one-way - NAS -> Radius server.

You will need to use another method (query the files, or query a 
database) to do what you asked.

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