NAT won't stay Open

[ZoMBiE MaSSaCrE]

As the title says, it won't stay Open. After I shutdown my PC and I turn it on after work, my game is on Strict. So I reset my modem through the online settings and it's back on Open. I have to do this literally every night if my PC goes off. What is causing this or how do I keep it Open?

I'm on Wired connection with these ports applied: 36081, 3074, 3075, 3478 for UDP and 80, 81, 443, 3074, 5223 for TCP. These are the only ports what will make my NAT Open. I've tried everything from port forward and from other players but that always keeps me Strict or Moderate. Treyarch provided me with the ports above.

So is there any way to keep my NAT Open?