For those who would like to open ports to communicate with the outside world. Raspberry / Orange Pi port 80 transfers web pages. The rest (spectra, audio etc.) goes through ports 8001 to 8005. If you intend to connect to the satellite tracking software, Gpredict, you need to add the ports 8006 and 8007. To communicate via VSPE and Omnirig to an external software, open port 8008.