[EXTERNAL] Re: issue with reject function while handling interim-update accounting

Vinayak Makwana vinayak.makwana at ecosmob.com
Wed Dec 6 13:35:33 UTC 2023

Re : issue with reject function while handling interim-update accounting

Thanks for sharing.

                 I am not much aware about COA configuration.
            Is there any way to send a reply-message like "Insufficient
balance" to a client in an account-accept request?


On Wed, Dec 6, 2023 at 6:21 PM Winfield, Alister (Senior Solutions
Architect) via Freeradius-Users <freeradius-users at lists.freeradius.org>

> As with all RADIUS things look at the BNG / BRAS / AP / AP-controller /
> etc (whatever the device is managing the session). Some have ‘quota’
> systems that allow a slightly nicer way of handling usage limits. Mostly
> they do this by sending a new authentication request when a quota expires
> along with enough information to indicate which quota ran out (But not
> actually stopping the session until you reject the ‘quota expired’ - auth).
> If not, you must play the short session game or hope that CoA’s work. Both
> achieve the desired outcome but not necessarily in the nicest way For
> example: CoA is particularly bad with DHCP based clients given there is
> nothing that a standard client does that will detect the session stopped
> until the lease expires; Short duration sessions are bad with dynamic IP’s
> regardless of the type of session being managed because it might change
> every time a new auth is accepted breaking established user connections.
> From: Freeradius-Users <freeradius-users-bounces+alister.winfield=
> sky.uk at lists.freeradius.org> on behalf of Matthew Newton via
> Freeradius-Users <freeradius-users at lists.freeradius.org>
> Date: Wednesday, 6 December 2023 at 12:00
> To: freeradius-users at lists.freeradius.org <
> freeradius-users at lists.freeradius.org>
> Cc: Matthew Newton <mcn at freeradius.org>
> Subject: [EXTERNAL] Re: issue with reject function while handling
> interim-update accounting
> On 06/12/2023 11:36, Vinayak Makwana via Freeradius-Users wrote:>
>         I am facing an issue in the accounting section. I do work on
> > freeradius accounting to handle START, STOP and INTERIM-UPDATE requests.
> So
> > in an interim-update request I am getting every 1 minute.
> That is very frequent. Every 15-30 minutes is more usual. You run the
> risk of overloading your database.
> > In that request i
> > am checking user balance if user balance is not sufficient then i am
> using
> > reject function to send reject request to client. but when I do use the
> > reject function then this function directly rejects the interim-update
> > request without sending access-reject  to the client.
> You can only reject an authentication request, you can't reject in
> accounting.
> The way to do this is to send a CoA disconnect request to your NAS to
> kick the session, if it's supported. If not you will need to either use
> some other method to terminate the session, or use shorter session
> lengths and then refuse on next authentication.
> See raddb/sites-available/originate-coa
> --
> Matthew
> -
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*Vinayak Makwana*

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