Metin Şaylan // December 3, 2011 (Updated: July 24, 2017) Wordpressblogprivateupdateswordpresswp-lock
WP-Lock locks down your blog for unrestricted access so that only registered users can access content on your site. It redirects unregistered users to login screen. It is very useful if you want to write a private blog. Read more on plugin page.