FreeRadius with perl, Unknown attribute: Acct-Session-ID

Alan DeKok aland at
Fri Apr 30 16:57:18 CEST 2021

On Apr 30, 2021, at 10:52 AM, Fatih Boy <fatih at> wrote:
> In fact, I was using exec modüle to trigger an validation phone call (IVR/IVN) and wait for the response. Since validation may take some time longer than 30sec, exec command returns with timeout error and user gets rejected. 
> Since perl module doesn't have a timeout value, I thought switching to it will some the problem.


  The server still has "max_request_time".  It will stop any request which takes more than 30 seconds.

  The solution to a crappy back-end is not to make FreeRADIUS wait longer.  The solution is to fix the back-end so that it takes less time.

  If the back-end involves a human phone call.. then just stop doing that.  Use another method.  RADIUS does *not* work with 30+ second delays for authentication.  This is a fundamental limitation of *everything* in RADIUS.  NAS, GGSN, BNG, all RADIUS servers, etc.

  You cannot work around this problem by switching to Perl, or by changing max_request_time.  Your solution simply will not work if it takes more than 30 seconds.

  Alan DeKok.

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