Crazy not to use wordfence security plugin on your wordpress site?
Great article from the Mark Maunder (CEO at Wordfence) about their wordpress firewall. Explains how their firewall works and how they set out to become a security plugin for wordpress that you would be crazy not to use. They feel they have now achieved that goal and we use Wordfence for all our sites and really appreciate the extra layer of security they provide. Have a read