In my home DSL/wifi router environment. I could open few web site (www.google.com/gmail and www.baidu.com) successfully, But all other site fail. (no gateway reply)
My Windows Vista got the same problem 2 weeks ago. And I resolve it by reduce Vista's default MTU setting. The reason was that DSL MTU is 1492 and it drop all packet which size bigger than it.
So I think 'no gateway reply' is a MTU problem too.... Will anyone confirm it?