3 Changing /etc/rc.conf to load the firewall

/etc/rc.conf needs to be slightly modified in order to tell the system about the firewall and to specify the location for our rules file. Add the following lines to /etc/rc.conf:

firewall_enable="YES"
firewall_script="/etc/firewall/fwrules"

For more information on the functions of these statements take a look at /etc/defaults/rc.conf and read rc.conf(5)