If you are trying to shh into your Apple Tv and are experiencing trouble and see something like:

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

If you are sure there is no other party on your WiFi network and no DNS spoofing possible the solution is quite easy:

1. Just delete the known_hosts file on your host computer by typing in the terminal: rm ~/.ssh/known_hosts

This will bring things back to normal. so you can ssh back into your apple TV via terminal.app:

ssh frontrow@ip.address.to.appletv

the password is: frontrow