I have tested out several security plugins and this one not only has a great reputation, but does not slow down my sites, while other security plugins did. I have not used the pro version yet, but I know I will soon, since I am planning to keep certain geographic regions away from my site. Checkout Ithemes Security.
About the Author
Yvette Sonneveld trains, coaches and assists entrepreneurs in the professional services industry to create manageable marketing plans that feel natural to them and work with their assistants to get the daily marketing tasks done smoothly.