If you are behind a firewall, you would need to open the following outgoing ports for the FR24-provided receiver to send data to our servers
80 TCP 22 TCP 443 TCP 19788 UDP/TCP 8099 UDP/TCP 123 UDP/TCP 53 UDP 15666 UDP
Please also white list our domains
*.fr24.com *.flightradar24.com
NOTE: If your are sharing from your own raspberrypi or linux computer, SSH port 22 is not required.