We're trying to build a system that allows WebSocket SIP traffic through an Nginx proxy to FreeSWITCH and I'm having trouble getting the proper IP address offered in the SDP. I added ext-rtp-ip and ext-sip-ip to the profile, but if I come in via the Nginx proxy, FS always offers the local address. I made some code changes to FS to catch the X-Forwarded-For header on the initial WebSocket connect, thinking I could substitute the forwarded-for IP address for the Nginx address, but this did not correct the problem. To be clear, if I run Nginx on 172.1.1.1 and FS on 172.1.1.2, when I come in via Nginx, FS sees the SIP IP as 172.1.1.1 and offers 172.1.1.2 as the RTP address. If I come in via a port-forward, FS offers what I have in 'ext-rtp-ip' as the IP address. Is there a way to force FS to always offer ext-rtp-ip, even if the address is local or does this require a code change? If it requires a code change, where does this logic exist? Thank you, Dan