I have a remote extension which registers with the Freeswitch server. The user can record his greeting in the Freeswitch IVR without a problem. Yet if the user calls me I cannot hear him, but he can hear me. I thought at first that it was a NAT issue so we placed the remote telephone directly on the internet and the same problem remains. The Freeswitch server is behind a NAT/router and I can see the packets from the phone coming into the router and being forwarded to the Freeswitch server. The router is not blocking the packets and is forwarding them to the correct server IP. I them placed wireshark on the Freeswitch server and I can see the packets leave the Freeswitch server and going to the phone But I cannot see the Freeswitch server receive the packets from the PFsense router, even though I can see in the router that the packets are being forwarded properly to the Freeswitch server IP. The Freeswitch server is running Ubuntu with no firewall, so in theory I should see the server accept or reject the packets. Yet I do not see any in wireshark coming from the phone, only those leaving from the Freeswitch server. What I do not understand is why, since he is registered, I cannot hear him, but yet he can interact with Freeswitch and record a greeting? Obviously packets are getting routed properly and Freeswitch recognizes them, some of the time. Can somebody suggest a possible explanation and solution to this problem? Thanks cjb