[Serusers] limiting no. of concurrent calls ?

[Kapil Dhawan]

Need to write a module, nothin available as such.


>From: "Frank Fischer" <frank.fischer at digitalnomads.ch>
>To: "'Hendrik Scholz'" <hendrik.scholz at freenet-ag.de>,"'Mike W'" 
><mwick00 at yahoo.com>
>CC: serusers at lists.iptel.org
>Subject: RE: [Serusers] limiting no. of concurrent calls ?
>Date: Wed, 8 Feb 2006 18:16:47 +0100
>
>
>In case he's encountering DOS attacks SER is IMHO the wrong place to defend
>against these attacks. A smart Firewall should do that job.
>In case it's only a bandwith problem again a firewall or any kind of QoS
>device could manage the bandwith "before" SER.
>In case he really wants to limit calls per user some kind of call statefull
>module would be requiered in SER. As far as i have been told recently some
>basic work related to call state tracking is done in the current 
>development
>iof a module call b2buac or similar. This might deliver the basic 
>mechanisms
>needed to implement call limits per user.
>
>- Frank
>
>
> > -----Original Message-----
> > From: serusers-bounces at lists.iptel.org
> > [mailto:serusers-bounces at lists.iptel.org] On Behalf Of Hendrik Scholz
> > Sent: Wednesday, February 08, 2006 4:27 PM
> > To: Mike W
> > Cc: serusers at lists.iptel.org
> > Subject: Re: [Serusers] limiting no. of concurrent calls ?
> >
> > Hi!
> >
> > Mike W wrote:
> > > Thanks for the pointer,  i need to look at the total calls
> > at the proxy.
> > > It could be a counter that increments at a INVITE (and
> > subsequent OK)
> > > and decrements at a BYE/ CANCEL
> >
> > You'll still run into the very same problems. You have to
> > take INVITEs
> > without Authentication into account. How about retransmissions?
> > People might want to throw advertisements for Session Border
> > Controllers
> > at you ;)
> >
> > > Is this something that can be configured/ customised ?
> >
> > If it's the plain number of requests per second that you want to allow
> > not taking any specific behaviour into account you might want to try
> > the ratelimit module from CVS.
> >
> > What's the problem you are facing? Are you seeing DOS-like attacks?
> > I'm asking as I'm interested in implementing countermeasures.
> >
> > Hendrik
> >
> > --
> > freenet Cityline GmbH, Hamburger Chaussee 2-4, 24114 Kiel, Germany
> > Phone: +49 (0)431 9020552, Fax: +49 (0)431 9020559
> > Internet: http://www.freenet.de, eMail: hendrik.scholz at freenet-ag.de
> >
> > _______________________________________________
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> > serusers at lists.iptel.org
> > http://lists.iptel.org/mailman/listinfo/serusers
> >
>
>
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