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I switch on the DMZ, i open the ports and i do all tutorials of the web but my nat never change. I have moderate nat or sometimes strict nat.
Help me please

Your NAT is important, obviously. If you're still having problems by following Youtube videos on how to fix the issue, your only option now is to call your ISP, and see if your routers firmware is up-to-date, and it's set to experience online gameplay. Also, before you do that, call Sony, and tell them this exactly: "Hi. I would like to get the port numbers to my PS3, so I can open them up."

They'll give you the numbers, have a pen and paper ready to write it all down. Then you call your ISP, and tell them you have your PS3 ports, anf you want them to open it up for you. :y:

you need to set you ps3 a static ip and dmz that ip. do not open ports, only dmz.

i can help you via teamviewer if you need help, it's really easy.