I have a similar problem with mine. I pulled mine out the box yesterday and everything was working perfectly with firmware 3.04. Like an idiot thinking newer updates = better router! Well 3.06 now makes my router never open up ports, ever. I can set DMZ and no go. I have used a web based full port scan for anything open, and it returns a "no ports found open" message. You can try downgrading to 3.04, but if it is anything like mine, no go. I can successfully downgrade it, just the port system is permanently broken. I have tried every firmware that every came out for my Rev C. I might just bite the bullet and play with fire. By that, I mean I am thinking about trying a Rev A firmware to see if it somehow fixes or breaks it. In the condition it is right now, it is useless to me anyway without any port forwarding etc.