Hi all, Sorry to ask again! I have a client that is having problems using sip phones on remote extensions. I have several other clients running 3CX via tunnel perfectly over the same network. I may face the same issue with new clients that want to use sip phones instead of 3cx software. And as u understand SBC is a tunnel manager for non 3cx devices. Do you know if it's possible to set up a server running SBC with a fixed public ip/farm to service all the extensions that may need to override local NAT / firewall settings? Have anyone ever tried doing it and succeed or failed? It's a little annoying to request each client to set up a server running it or to set it up locally whenever the problem happen or to send them a raspberry pi everytime needed. Thanks again.