Can't connect to Internet, my modem is dishing out a private IP address and suber class b mask. I need to know the regular IP address and mask for Comcast but I have a feeling the modem is crapping out on me.
Is the address 169.254.0.x ?
A view of your IP address (ipcoinfig /all) will help. You might try restarting your modem, or find out if you're getting a dynamic or static address from your ISP.
You could also have a router/modem combo device. Just realized that you posted the model. Its not a combo device.
More information will be needed to actually help you.
One last thing is to make sure that your ISP can contact your modem. You will have to call them to test the connection.
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