My Wi-Fi connection does allow me to play destiny but when my Ethernet cable is plugged in I get a message saying the servers are unavailable, anybody know anything?
Unplug your router and Internet modem/gateway from power. Leave them disconnected from power for at least 5 minutes to clear their caches. After 5 minutes reconnect power and once the network is back up try the game again on Ethernet.
If it still won't connect try connecting to a different port on the router. If that doesn't help try using a different ethernet cable.