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...
HA config - After trying to upgrade to the latest version I can no longer reach the web admin page

Sophos UTP PC Config: The PCs (HP SFF 6200 pro i3 (2120) 3.3Ghz) that I have been using for Sophos UTM for years has a total of 6 Ethernet ports. eth0: (Dell/Intel U3867 single port PCIe) is the HA...