Hi, I have been able to make it works by compiling freeswitch at commit c321261f0631b81. I choose this version as I suspect that the patch "e5f214d11badc1ff3e3bd72f9f57d5d72dc0f312 <https://freeswitch.org/stash/projects/FS/repos/freeswitch/commits/e5f214d11badc1ff3e3bd72f9f57d5d72dc0f312>FS-8031 -m update to support firefox too, they only send us 2 stun packets total and if we don't adjust, they will never send any more" to create the issue. Regards, Nicolas Le 11/09/2015 12:27, Nicolas Trangosi a écrit :

Hello, I have installed Freeswitch server 1.6.0 to test Verto. I am able to make call without issues with Chrome or Firefox 39 and browser behind symetric NAT. When I try with Firefox 40 and browser behind symetric NAT, the signaling part is OK, but no media is sent or received. I have took a wireshark trace on server, and it seems that Freeswitch send STUN binding requests always to same destination (and do not try other candidates from SDP or from incoming STUN binding requests). As NAT is symetric, port discovered using ICE are wrong but STUN request sent by browser should allow freeswitch to find right host and port.

Thanks for any help, Nicolas