NAT issue ASTPP 6

I’m evaluating ASTPP version 6 to replace our old VoIP solution. After provisional configuration i can push some calls, but i found that it does not deal properly with NAT.
ASTPP works on public IP, call is being placed from Linphone behind NAT.
Linphone provides SDP with Connection Address: and ASTPP sends RTP stream to which results with no media on linphone.
From my experience, softswitch should ignore IP from SDP provided by retail devices (customers) and should always send RTP back to the same address and port as origination stream from device. Is there any special settings to achieve this ?

Hello @saddamus ,
Please check in sip profile GUI, where you can find ext sip ip and ext rtp ip variable. In that do you have private ip or public ip.