My other option is to write a driver (which I’ve spoken to Milestone about) but it seems that the universal driver is so close to making this work that I wanted to ask before starting a potentially unecessary project
This question seems general network issue. It is impossible to receive RTSP (RTP/UDP) data over the outside network. If my understanding is correct this is a question suited for the Milestone Support Community. Please ask again in the support community, you should get better help from the partners