Something to be aware of if you're running FBSD 6.3 or 7.0. The security script /etc/periodic/security/800.loginfail appears to currently be broken.
The short explanation is that there is an egrep expression in the script that is incorrect. For more details, see open
PR conf/120263. Included in that PR is a proposed fix, which you may choose to do manually if the script's output is important to you (it is to me).