Dear Kristian,

Just take a look at the value you have at "Auth Lifetime" or "Session Timeout" AVPs on AAR request from P-CSCF through PCRF. Those are (afaik) Base Diameter AVPs. Those values are referring to a timeout to cleanup the diameter session. It seems like, when this timer will expire, the session will be cleaned up together with the infos in usrloc.
This way, P-CSCF receives a packet from an UE which is basically unknown, so the request will be dropped and an error will be sent out.
So, in theory, this value should be much more than the re-registration of the client itself.
Anyway, i am only guessing because i haven't still completely addressed the problem

Best,

Federico Favaro

On 07/14/2016 06:14 PM, Kristian Martens wrote:
Hi,

I have installed Kamailio version 4.4.1. Everything works just fine. If
I connect a PCRF via Rx to the P-CSCF, the registration still runs
through as expected but the subsequent SUBSCRIBE is rejected with "403
Forbidden - You must register first with a S-CSCF" error cause or is
simply ignored (see attached wireshark traces).

And, if I disconnect Rx and restart the P-CSCF, the "forbidden" problem
still persists. (But I can work around this by cleaning up the P-CSCF
database.)

Any suggestions how I could get Rx working?

Thanks,
Kristian



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-- 
Federico Favaro
R&D Department
Athonet s.r.l
federico.favaro@athonet.com