My xbox 360 never has an open NAT type.?

Happened to me. 2 ways to fix this the easy way and the hard way. Hard way is to long to tell you but the easy way is what i used. Just turn your router and modem off together for about 1-2 mins. Then turn them back on. Keep doing this till it is open. it will change it around each time so don't be worried it it goes to strict the fisrt time. It will work out fine.