DNS (UDP port 53) ... see DNS settings on the camera
NTP (UDP port 123) ... see NTP settings on the camera
RTMP (outgoing TCP connection - destination port 1935) ... connection to the YouTube/streaming server
HTTPS (outgoing TCP connection - destination port 443) ... connection to our server (required only for trial license and Facebook and YouTube streaming)
Please note that you should limit the firewall rule to source IP (camera IP address), but you should not limit the destination IP address. There are many dynamic IP addresses behind the DNS (rtmp.youtube.com or camstream.com).
Please don't configure the destination limit on your firewall rule.