Update: Better WP Security has changed it’s name to iThemes Security.
To learn how to improve the security of your WordPress website, watch this video:
Note: If you receive a “error” on your page, it is due to the security plugin setting for 404 intrusion detection. A 404 error occurs when you get a page not found on your site. If you have a bad link that links to a page on your site that doesn’t exist or if you type the wrong page address in the url address box then you will get a 404 error. If this is repeated a number of times, the security plugin automatically shuts down your site for a specified period of time (lockout period), 15 minutes by default. All that you will see is “error” for 15 minutes. The following settings can be found under the detect tab.