What info can websites track by?

[skydrive]

Just wondering what info a regular website can obtain and track me by when I go to it? I'm trying to access a site using proxies and ccleaner but the site seems to pick up I've already been there and made an account there because it blocks areas right after I join again. either the proxies have been used there already (which is possible) or the site tracks something else?

 

[Catsrules]

Sights track by IP address and cookies.
What do your mean it block areas right after you join. like log in?

 

[dEAne]

Every time you visit a site you have a cookie stored in your computer by a user's web browser. A cookie can be used for authentication, storing site preferences, shopping cart contents, the identifier for a server-based session, or anything else that can be accomplished through storing text data. You are using a ccleaner which erase your cookies so every time you go back to that site you are tag as a new visitor.