What NAT are you getting in the ps4 connection status screen? Failed, Type 3, 2, or 1? Type 2 is the best you can get wireless. Type 1 is best you can get wired. Either 1 or 2 will give you Open NAT in games. You will usually have to forward ports in your router and sometimes put your ps4 in a dmz. Both of these tasks can be done in your router's set up screens. To forward ports, follow the guides in portforward.com, for your particular router and the ps4. Also go back and forward ports for whatever particular game your trying to play.