I cannot connect to the Internet on My Mid 2013 MBA, running 10.11.3 either through Wi-Fi connected to my router, or tethered to my iPhone via USB or Bluetooth . Rebooting the machine has not solved anything.
I cannot ping any external IP, I can ping other devices on the network.
All other devices in the house (Various ipads, iphones, windows PC's, NAS Box, Raspberry Pi's etc) all connect fine through the same router. Resetting the router hasn't helped either.