The protection of your WordPress site is very important. There are many plugins which will do the job, but to be 100% calm and satisfied with your site’s security I would highly recommend one reporting tools called Security Ninja.
This tool will allow you to discover any flows your WP site has. By using your favorite FTP manager (I use FileZilla) you can download all weak file which need to be modified – change them, upload back and protect your blog. The plugin gives valuable suggestions and you can read all of them here.
Learn how to use this useful protection reporting tool by watching the video below and secure your WP web-site(s).
Security Ninja Video Tutorial and Review