init.d and security levels

In the man page for init.d, there is a discussions of FreeBSD security levels. This is a number from -1 to 3 (least to most secure), which allow you to limit things like kernal module loading all the way up to sealing it down at the network packet level. You can set the security level via a variable in the rc.conf file in /etc:

kern_securelevel="1"

FreeBSD Hypertext Man Pages: securelevel