Hello DodgieFps,

I am sorry to hear you are having this problem.  Unfortunately, when I search for BigPond Modems, the only ones that come up are Telstra.  However the model number you provided (8276) is not a model number for a Telstra.  Can you please tell me the make/model number of your modem so I can see if there is any additional information we can give you to get this solved?

Hello theotherperry04,

The Ubee DVW3200, is actually a router/modem so it may be possible that while the NAT is open, then ports could still be blocked.

I recommend that you go to http://canyouseeme.org (from the Playstation 3 Internet Browser)

In the empty box, type in 80 and select Check

Repeat this process for 443, 3074, 3478, 3479, 3658, and 5223.

If those come back as either closed or timed out, then you will need to do some networking troubleshooting.

If the ports are closed/timed-out, first you will want to assign a static IP to your Playstation 3 (steps can be found here, http://portforward.com/networking/staticip-ps3-playstation-3.htm.

Once you assign a static IP to the console, then you will just need to forward the ports for that IP using this link, http://portforward.com/english/routers/port_forwarding/Ubee/DVW3102B/PS3_Call_of _Duty_-_Modern_Warfare_3.htm

Those steps are not specifically for the DVW3200, but the DVW3102B should be similar enough in the menu to show you what to select and type in.