Hello, I am using Freeswitch version 1.2.12 on Debian 3.2.46-1 x86_64. My main use case includes terminating calls through gateways. In most of my gateways everything is working 100% right, but I have a private integration with a termination gateway provider which isn't working. The problem is that when performing a bridge , the SDP negotiation is finishing but no RTP packet are sent to the gateway and I see the following lines in the log: [NOTICE] switch_ivr_bridge.c:274 Hangup sofia/external/999112123752658 [CS_EXCHANGE_MEDIA] [DESTINATION_OUT_OF_ORDER] If I capture the traffic I can see the following ICMP packet: 6 17.453667000 144.76.108.53 85.92.157.36 ICMP 242 Destination unreachable (Port unreachable) The strange thing is that if I reboot the machine, the problem is solved for one session and than keep reproduces on the following calls. I eliminated all firewalls issue by disabling the firewall , and tried changing the hardware to Ubuntu but still the same behavior.keeps coming back. Is there any know issue which might explain this? Best regards, Doron