Hi, I’m willing to use RTSP through my netfilter-based firewall (that uses NAT for IPv4). After a quick search, I found that someone implemented NAT and conntrack modules for RTSP a few years ago, and it looks rather unmaintained: https://github.com/maru-sama/rtsp-linux Has anyone asked for inclusions of those modules in netfilter (and linux)? Are there conditions for inclusions of such protocol-specific modules? I haven’t yet even tried to check whether those modules compile with recent versions of netfilter, but I may soon be able to devote some time on this… Cheers, -- Nicolas