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* [Kernel 2.6.26][rtp/rtcp]
@ 2012-01-16 10:40 Alexandre Moore
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From: Alexandre Moore @ 2012-01-16 10:40 UTC (permalink / raw)
  To: netfilter

Hello there,

I am currently working on a linux kernel 2.6.26 box with linked to 
multiple ISP (so one or more ethernet connections) and specific ones for 
VoIP usage.
What i want is to restrict SIP rtp/rtcp to specific interfaces 
(load-balance) and I can only use iptables rules kernel modules or hack 
the kernel itself (for resource purposes).
My problem is that I have two different servers for sip rtp (port 5060) 
and sip rtcp (random port 10k+).
So when the rtcp connection is established, it is not related/expected 
to the rtp and I can't track it with iptables. (callback 
ip_nat_sip_expected in net/ipv4/netfilter/nf_nat_sip.c is not called).

box ----- > rtp server xxx.xxx.xxx.1
        \-----> rtcp server xxx.xxx.xxx.2


I am doing it wrong ?
Is there a kernel module that I missed ?
is this kind of trivia is dealt differently with more recent kernels ? 
(maybe i can convince my boss to upgrade).

Regards.

(French IT dev here, so sorry if english is a bit awkward).

-- 
Alexandre Moore
http://alexandremoore.com


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2012-01-16 10:40 [Kernel 2.6.26][rtp/rtcp] Alexandre Moore

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