I have read several threads on several forums, and like many of you, I cannot connect to Xbox Live.
I finally spoke to Verizon tonight, and the tech tried a variety of ideas, including resetting the router, powering it down, etc. He even supposedly Released and Renewed the DHCP from his end. All to no avail.
I have followed this thread, and tried Releasing and Renewing my router's DHCP on my own. IPChicken.com has confirmed that I got a new IP Address (currently [mod removed]) on a few occasions, but still cannot connect.
Verizon asked if I could hardwire the Xbox to the router... no can do. The router is upstairs in our computer room, and the Xbox is downstairs in the den.
I am glad to hear others have used these same methods, and gotten connected, but I cannot seem to do so, and that makes it all the more frustrating.
My router is the Actiontec MI424-WR
Hardware Version: D
Xbox 360 is from Launch Day (yes, never red-ringed once on me!)