How to Lock WordPress to Users Only

1. Sign into your site and click on 'Plugins' then click 'Add New.' Type 'Member Access' into the search box. Click 'Search.'
2. Click on 'Install Now' under the 'Member Access' plugin and click 'Ok.' Click on 'Activate Plugin.'

3. Click on 'Settings' then click on 'Member Access.'
4. Place a check inside every box on the options page to completely disable non-members from accessing your Wordpress site. If you'd like to allow to view posts or pages, deselect the specific feature. Select the 'Redirect' feature if you want to redirect non-members to the login page. If you would prefer to display an error page, leave the check box blank for the 'Redirect' feature. Click on 'Save Changes.'
5. Click on 'Posts' or 'Pages' if you want to make a specific piece of content accessible to everyone. Open the specific post and scroll down to the 'Member Access' section. Click on the box next to ' Ignore the default settings and make this post visible to everyone.' Click on 'Update.' The specific post or page is now visible to everyone.