Remembered this from the Christmas DDOS. Attack. Clear cache PlayStation 4 Press and hold the PlayStation button on your controller.Select "Turn Off PS4".Let the PlayStation 4 to fully power down and wait for 10 to 20 seconds.Restart the PlayStation 4. Settings, network, setup network, manual settings. Set all automatic except MTU settings MTU 1473 If it doesn't work run automatic settings. Sometimes the reset fixes it. When back on psn and unable to get in game, just restart. It took me 3 times. Hope it works for you