Ok, I'll try the parameter NDLB. Is it suitable in an hosted environment (thousand of extensions)?

Anyway, the problem is that I can't use STUN (phone side configuration) because I have two needs:

1) Phone A (192.168.0.100) calls Phone B (192.168.0.101), in this case the RTP flow should be sent directly between two endpoints. If I use STUN the SDP "A" contains the public IP and not the private IP (that must be used for device reachability).

2) Phone A (192.168.0.100) calls Freeswitch (Public IP), in this case the RTP flow shoud be sent to Freeswitch Public IP and Freeswitch shoud send the RTP to the Phone A NAT IP. Here the STUN is the best solution.

What is the best practice in this scenario?

Regards,

Il 06/06/12 18.28, Brian Foster ha scritto:

The issue is more likely the phone, as the phone is responsible for handing FS the correct IP. There is however a way to force this on the FS side but may break other devices. Please take a look at NDLB (No Device Left Behind) parameters for Sofia on the wiki.

Brian Foster
Endigo Computer LLC

Sent from a mobile device.

On Jun 6, 2012 12:15 PM, "Carlo Dimaggio" <jaasmailing@gmail.com> wrote:

Hi all,

I have a problem with RTP and NAT.
The scenario is Hosted PBX and Natted phones (yealink):

Phones (192.168.0.x) - NAT -> FS (public IP)

When I call FS (for example an IVR) from a Phone, FS send the RTP to the private address (192.168.0.x) instead to the public NAT IP.
The registration is ok: