Etc/rc.conf
From FreeBSDwiki
/etc/rc.conf controls basic system functionality such as what IP addresses and DNS resolution configuration your various network interfaces use, and which basic system daemons (such as sendmail or bind) are started at boot.
It's worth noting that some folks (such as Jimbo) choose to start all daemons from scripts in /usr/local/etc/rc.d instead of using lines like BIND_ENABLE=YES in rc.conf, just for consistency's sake.
