If both media proxies are in the public Internet they do relay to each other without any special settings. They still expect that the client send first packet in order to start relaying. If you have private IPs on either media proxy it will not. Also make sure you run a recent version (>1.1) Adrian How can I chain two mediaproxies? It's mentioned in the Readme, that this is possible, but it's not mentioned how. I have two SER servers in two networks, both running with mediaproxy. Client A can reach SER A, SER A connects to SER B (with forward statement), which contacts Client B. It's, because of the design of the networks, not possible that client A can connect SER B or client B can connect SER A. I configured SER and mediaproxy with default values (from the mediaproxy-example ser.cfg), however, it seems, that the two mediaproxies don't talk to each other, they are waiting for Client connection instead. Regards, Henry