Hello! our setup: 3cx-server behind a NAT with all nessesary ports forwarded 3cxphone extentions (in a different location) behind a full-cone NAT everything works fine, great audio, SRTP works too. now, if we set up TLS (everything according to the how-to from the blog), we get a register, but it says "Authorization system can not identify source of: SipReq", followed by connection data which seems to be pretty valid, too. The connection is established, though. further, if you make a call from that extention, it is rejected and we read the following in the log: "Unidentified incoming call. Review INVITE and adjust source identification". calls TO that extention work regardless. if we go on and setup a tunnel within the 3cxphone, it seems to start working, BUT: there is no TLS any more (UDP transport is showing in the logs). can anyone help? thank you. Roman.