Internet connection failed but IP address obtained Question?

[Peter]

You are probably getting your IP address from your router. That means that your connection from your PS3 to your router is working fine. However, the fact that you cannot connect to online play means that something isn't working right past that point. It could be that you have a firewall in place on the router, or it could be that your ISP is doing something that might be blocking PS3 online play. It could also be that your internet connection (to your router) isn't working right.

If you have a cable or DSL modem, try unplugging the power cord on it, waiting a minute or so, and then plugging the power back in. Then do the same thing with your router. Then go back and try your PS3 again. If it continues to have problems, try contacting your internet service provider to see if they can spot any issues or if they are blocking this kind of service for some reason.