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I've been stuck on NAT Type 3 ever since i've got my PS3. I've tried setting up port fowarding on router and such, setting a static ip and even putting the PS3 into DMZ to no avail.
Whenever I am connected to my router either by LAN or Wi-fi I have a NAT type 3 yet when I connect directly to my modem I get a NAT type 2. This leads me to believe that my modem is the cause of the problem so I tried setting up port fowarding on the modem and it made no difference.
Modem: THOMSON ST5x6v6
Router: Belkin N600
While I can't give a specific answer, I think this issue has been raised on the forums before. If I recall it's because of the seperate modem and router. The solution involved putting the router into a bridge mode, maybe google how to do that with your model router and give that a try.
Edit: I knew I had seen it before, give this thread a read.
Ok from that last post i've made some progress. My router is a belkin which means I could set as an access point rather than a router meaning it will no longer block any ports. However any attempts to port foward on the modem have no effect on NAT and UPnP is now unavailable according to the PS3 test yet the modem has the setting enabled.
That was the DMZ on the router though. Now the router basically isnt a router any more and i'm not sure if the modem has a DMZ.
UPnP is quite important for many games that you play online. You also need it for Skype on a PC.
As it says in the aforementioned Obtaining NAT Type 2 thread, you should set your Thomson modem into bridge mode but, according to a few other forum threads I've read about your modem, that might not be possible because the modem is sometimes configured automatically by the ISP.
Do you get UPnP available when you connect the PS3 directly to the modem? What IP address does the PS3 have when connected this way? Does it get the same IP address when you have it connected via the Belkin in access point mode?
Sorry for taking so long to reply.
I have the PS3 set on a static IP so the ip doesn't change at all. The settings I have work both when connect to the router and modem. When connected to the modem itself UPnP is enabled (which I assume allows me to get NAT Type 2).
UPnP and NAT type do not effect each other. Getting UPnP working won't automatically get you NAT type 2.
UPnP allows the PS3 to automatically configure required ports on the router so that traffic to certain ports from outside the firewall are automatically sent to that host (think "dynamic, automatic and smart port forwarding").
NAT type is harder to explain.
Using a static IP prevents the PS3 from getting some information from the modem (or the router). If you need a static IP on the PS3 for port forwarding purposes it is better to set it up as a reserved address on the modem's dhcp server. Use Easy setup on the PS3.
Checklist (for belkin as access point only)
if that doesnt work you'll have to buy a new modem and router in one.
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