we trying to setup live streaming using an RTSP/RTP-based encoder, on our server we use the csf firewall. if the csf firewall is disabled the rtsp connects and everything works, if it is enabled then the rtsp has the below error:

Unknown connection error

for what I see from the page
I have to allow incoming and outgoing UDP ports from 0-65535 on the csf.
but it still not working when I allow these ports. but the strange issue is that some services on the wowza jump from a few viewers online to hundreds of viewers, all iOS connections.

my question is what I'm doing wrong?