Deduplication of accounting requests

Alan DeKok aland at
Fri Feb 12 15:28:18 CET 2016

On Feb 12, 2016, at 9:25 AM, apopov at wrote:
> From RFC: "The RADIUS server can detect a duplicate request if
>      it has the same client source IP address and source UDP port and
>      Identifier within a short span of time." 
> Does it mean, if my application send accounting requests from one port, I can send only 256 request in short span of time, next request will be handled as duplicate regardless of attributes in it? 


> How freeradius detect that package is duplicated? What fields used for this purposes ? Where and how it configured? 

  It detects duplicates using (among other things) the request authenticator.

 To be clear, if you're not implementing a RADIUS client or a RADIUS server, you have no reason to worry about this kind of detail.  Just trust that the RADIUS client and server do the right thing.

 If you are implementing a RADIUS client or a RADIUS server, go read the RFCs, and the FreeRADIUS source code.  This list is for FreeRADIUS questions.  We're not in the business of helping people write competing software.

  Alan DeKok.

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