Modify sub domain, port and path of URL

First let me explain the reason for my question. I am runnin an internet radio station country-radi eu and want to use ports 80 and 443 for streaming the audio, because in public networks ports like 8000...
HowTo: Block IoT scanners like Shodan, Censys, Shadowserver, PAN Expanse etc.

They getting more and more a problem. how can i block those networks via utm 9 ?