> This is not possible. The netfilter coreteam strongly > opposes including conntrack/nat helpers for protocols where > there is not at least one free software client and server > implementation. AFAIK, there is no free RTSP server > implementation so far. Please inform me, if I'm wrong. Is this what you are looking for ? Server : http://developer.apple.com/darwin/projects/streaming/ Not GPL, but APSL. Don't know if that's enough. Actually, here is a list with multiple servers and clients : http://www.cs.columbia.edu/~hgs/rtsp/implementations.html I didn't check on all of them for licensing. Gr, Rob