High, I sucessfully set up a Raspberry Pi to feed FlightAware. It ran for about two years: 624 days (22/3/2016 - 5/12/2017).
The FA web site now says it’s not receiving from my set up. I’m puzzled, as the FA web site shows the IP address of the unit, and I’m able to view the data via my local LAN set up.
Have you tried to access the pi locally through SSH or a terminal window, then do a piaware-status command? Would tell you if it is feeding data. If so, then you might be looking at a firewall type issue.