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I really need help to make my NAT type on my PS3. I have a D-link router and a Thompson (speed touch) modem. I tried everything like port forwarding, and putting my PS3 on DMZ mode but nothing seems to work and i don't want to buy a new router.
I have a windows 7 computer and Eset Nod 32 security. PLEEEEEEASSSSE HELP.

Go into your router and set the PS3's IP/MAC Address to use DMZ. Otherwise, I'd look into You must login or register to view this content. or You must login or register to view this content. firmware. You'll probably have more luck getting dd-wrt on it. I don't know if you can use either of them on your router but it's worth a shot. D-Link Firmware is trash.

Go to this on your computer--> 192.168.1.1 and user should be :Root and password should be assword and then put it to DMZ and your done!

Putting your PS3 into a DMZ (demilitarized zone) simply opens all of the ports on it.

If you have the following problems, this is likely to fix it.

Not being able to join rooms
Not being able to speak over your headset
Not being able to hear other people over their headset
Not being able to join private games
Any problems to do with connectivity to the PSN, especially if your computer will connect to the internet, but your PS3 won't.



Part 1-(On PS3)

Firstly, you will need to assign your PS3 a static internal IP address. Normally whenever a device connects to your router it will be assigned a different internal IP address. These are normally 192.168.1.2, 192.168.1.3, 192.168.1.4 and so on. Assigning a static one will ensure that your PS3 will get the same one every time it connects.
Go to the "Settings > Network Settings > Internet Connection Settings" option on the PS3 XMB. Choose whether you are using wireless or wired.
Both selections should show a page called "Address Settings". Here you will need to select "Custom". Another page will then display entitled "IP Address Setting". The option "Manual" will need to be selected.
This will display a page where customizable IP Addresses are available to be entered.
IP Address - This will need to have the Static IP address in it. Use 192.168.1.80, simply because it is unlikely that 80 other devices will be connected at the same time.
Subnet Mask - always set to 255.255.255.0
Default Router - Is the internal IP Address of your router.
To get the exact ip of your router you should go to
Start
Run
cmd [Hit Enter]
Type in ipconfig and hit enter, this should come up with all the ip addresses to do with your computer and the network. The address you will need to enter in this option is listed as "Default Gateway".


Primary DNS - Same IP Address as "Default Router"
Secondary DNS - Same IP Address as "Default Router"
Proxy ********* When you get to the proxy screen, select "Do not use Proxy"
MTU ********* Automatic
UPnP ********* Enabled



Part 2-(On PC)

In your Internet Browser, type the address of your default gateway, this will take you to your Router Configuration Page. Look for any mention of DMZ
When you have found this, it will ask you for the Static IP of the DMZ host. This is simply the Internal IP that you assigned your PS3. We used 192.168.1.80.
Finally, turn off your Router, PC and PS3 for a few minutes to ensure that the new settings are loaded. Then your ready to go!

Simple soloution = go on cod4 with friend (who you cant join) invite him, play 1 game, go on game you cant join, invite and voila!