The network a PS3 connects to will affect the NAT type it reports in its network settings. The only instance where this poses a problem is when the PS3 reports a NAT type 3, which means the PS3 has network connectivity but its ability to communicate is severely restricted. This will cause problems when you're trying to play games online. To fix this issue, enable Universal Plug and Play (UPnP) on your router or designate the PS3 as a DMZ (demilitarised) server.
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Open a web browser.
In the address field, type in the IP address of your router. Commonly used IPs are "192.168.1.1", "192.168.15.1", "192.168.254.254" and "192.168.254.1" (see Tips).
Log in to your router. If this is your first time doing so, use the default username and password (see Tips).
Locate the option labelled "UPnP" or "Universal Plug and Play" and click "Enable." UPnP is commonly listed under "Port Forwarding," "Administration" or "Security" menus (see Tips).
Click the "Save" or aptly named button at the bottom of the page.
If your router doesn't automatically reboot, unplug its power cord for 10 seconds then plug it back in. This will force the router to reboot and use the new settings. Close your browser.
Obtain the IP address of the PS3 by checking its network settings in its network menu.
Open your router's DMZ configuration page (see Tips), commonly found under a "Security" or "Gaming" menu.
Click "Enable" or similarly named option to enable DMZ functionality.
Type the PS3's IP address into the field provided.
Click the "Save" (or similar) button at the bottom of the page.
If your router doesn't automatically reboot, unplug its power cord for 10 seconds then plug it back in. This will force the router to reboot and use the new settings. Close the browser.
Tips and warnings
- Reference the router's manual or the manufacturer's website for specifics regarding your model.
- You only want one IP address for the PS3, otherwise you'll have to change DMZ settings every time the router assigns a different IP to the console. You may do this using MAC address binding, or by manually assigning the PS3 an IP address.
- Be aware that enabling UPnP can pose a security risk; the router will open any ports requested of it.
- A DMZ server operates outside any security enforced by the router; the risk is minimal when designating a console as one, but the potential always exists.
- It is not necessary to enable both UPnP and a DMZ server; doing so is redundant and creates additional security risks. A DMZ server already operates without restrictions, while UPnP allows a router to dynamically open ports. However, once those ports are not in use, the router keeps them closed.
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