If you site:news.cnblogs.com in google's search box, you will see a lot of web pages are indexed by google. But if you click on any of the search results, you will be redirected to account.cnblogs.com which asks you to login.
I wonder why google indexes the webpages belong to news.cnblogs.com? I tried to switch my browser's user agent to googlebot but still was redirected to the login page. How can google see the real content? Is it possible for normal visitors to see the blocked content without login as google does?