This is a guide for setting up a DMZ for your PS3.
This will open all ports with your internet connection so that you will be less likely to encounter problems such as: Issues with headsets (either not being heard by others or by others not being able to hear you) / Issues with joining private/public games / Connectivity and stability issues with PSN.
We will start with the PS3 side.
You will need to make a static IP address for your PS3. (By manually assigning an IP address for your console you are just ensuring that it will always have the same IP address every time that it is connected to the internet.....when you choose 'automatic', you risk the console being assigned a different address)
Now on your XMB go to SETTINGS -> NETWORK SETTINGS -> INTERNET CONNECTION SETTINGS -> CUSTOM.
Choose if you are going to be using wired or wireless and then enter your WLAN and WLAN Security Settings.
When you get to the IP ADDRESS SETTING menu select MANUAL and enter the following...
IP ADDRESS - 192.168.1.50 (This is going to be the manually assigned static address)
Now for SUBNET MASK and DEFAULT ROUTER do this:
Get on your computer and go to:
START -> RUN -> Type in cmd in the box and then click OK -> When the MS-Dos
window pops up then type in ipconfig and then hit enter.
Enter what is shown for SUBNET MASK and then enter the numbers from the DEFAULT GATEWAY on your computer for the DEFAULT ROUTER.
As for the PRIMARY and SECONDARY DNS you can take this link to find a list of free public DNS servers --> Free Fast Public DNS Servers List
After you enter everything on that page then click:
MTU - AUTOMATIC
PROXY SERVER - DO NOT USE
UPnP - ENABLE
Now hit to save settings and then turn off the PS3 system for now.
Now you will need to go to your router's configuration page by typing in the DEFAULT GATEWAY address into the address bar of your computers browser. (For Linksys owners, the default address is 192.168.1.1 and then enter admin for username and password if prompted)
On the configuration page go to the APPLICATIONS AND GAMING tab -> then go to DMZ.
Check the ENABLE option and enter 192.168.1.50 (your PS3's static address) into the destination address box.
Click on SAVE SETTINGS and then exit.
Now just for safe measures make sure to turn off the router and the PS3 for a few minutes and then restart the router then PS3 so that the new settings can take effect.
That is all that there is to it. Hopefully now you will have a much better connection with a lot less problems.