I have the Kamailio and FS behind it (in Kazoo). Both are in one ip address 10.34.101.104

i use rtpengine_manage().

When I call from Asterisk which is behind NAT :

1) Asterisk in VMware player (NAT, local ip 192.168.175.136) and public 10.34.101.103 - the voice was ok? in logs I saw Kernalizing media

2)Asterisk in KVM(NAT, local 10.28.40.101 public 10.101.29.45) and no Kernalizing in /var/log/messages and no voice.

The Asterisk configs are absolutely the same.

Kamailio log shows no errors

In both cases the INVITE's SDP connection is 10.34.101.104 - the address of the Kamailio

in the ' case 1' I see all RTP streams : 2 rtp streams - between asterisk and kamailio and vice versa, 2 -rtp streams between kamailio/rtpengine - Freeswitch and vice versa

in the second case I see the following RTP streams: 1 rtp stream - from Kamailio to Asterisk, 1 rtp stream - from Freeswitch to Kamailio

How to debug such cases?

Any help is appreciated.