Today, all of a sudden, when a friend wanted to see my blog, it required a login/password. I have not changed any configurations at all, and my blog has been fully accessible up to this point. Further, my login credentials (to the admin area) do not work with this login either. Is it an attack on my site? I do not know where to start looking. I host the site (including the database) on my own domain residing at a web hotel. Any help appreciated.