Originally posted by Mr.KANE
Go to this page
You must login or register to view this content. and enter your router's password and username. Find security settings (may be in setup mine was) on it. Change encryption to WPA and enter the new password on the ps3. check your connection.
That will change the password encryption used on your wifi.
It will do nothing for nat type.
To get it open you will have to either manually forward the necessary ports or put your ps3 in a DMZ.