I got a weird problem with a PIX 515 (7.2(2).18.
I'm natting SIP behind the Firewall [CME 4.1(0) (c2801-ipvoicek9-mz.124-11.XJ1.bin)].
Incoming and outgoing SIP-calls are working perfectly.
See old conversation http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Unified%20Communications%20and%20Video&topic=IP%20Telephony&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40.1ddd38eb
Unfortunately, "forwarding-all" function (with a SIP-incoming call to an external number [through the same SIP-Proxy])
is sending the SIP-signal (ringing) but no RTP-flow.
On the PIX the "SIP inspect" is activated.
Is there a possibility to configure a symmetric / consistent NAT on the PIX to allow the RTP-stream to be built up?
Thanks and regards,