dhcp and dns come in on udp ports, now i know this never been even consider but is it possable sent rtsp over port 53 udp, now i got 3 camreas i getting ready set up, and i can get up to date software for poe swich,
so only quistion becomes can the stream be sent over port 53. 136 500 each these ports required as well ports 67 and 68 it would be a intresting test to see if it could be done, i do know for fack that they can use port 53 udp to set up vpn for hacking,
saying this why cant streaming be sent over same port, only probem i might see is with a busness domain or other dns servers, but ports offten run more one protocall over them, this wold be worth testing, as if it could work, would solve ton probems,one could run these on diffrent vlan and use port forwarding to that vlan not ever been consider but worth to try