For everyone that may see this thread, here’s what works for me as of this date.
[ 2] 9003/udp ALLOW IN 192.168.0.0/24 # roon
[ 3] 9330:9339/tcp ALLOW IN 192.168.0.0/24 # roon
[ 4] 8008:8009/tcp ALLOW IN 192.168.0.0/24 # roon
[ 5] 30000:30010/tcp ALLOW IN 192.168.0.0/24 # roon
[ 7] 1194/udp ALLOW IN 192.168.0.0/24 # roon
This is interesting to me. I have the Roon core (and HQ Player) on Ubuntu Server (I am a novice though really, and still learning how to use via the terminal) and I wanted to enable the firewall allowing UDP port 9003 and TCP ports 9100-9200 recommended in this thread however I couldnt get it to work. I just tried, on the off change, the above and its working now.
Here’s how to enter a rule, commented for Roon, on a local subnet (one line). sudo ufw allow from 192.168.0.0/24 to any port 30000:30010 proto tcp comment roon
You can also use the package gufw which is graphical.