freeBSD config /etc/rc.conf

check_quotas="NO"
local_startup="/usr/local/etc/rc.d"
usbd_enable="NO"
ssd_enable="YES"
dhcpd_enable="YES"
dhcpd_ifaces="rl0"
inetd_enable="YES"
sendmail_enable="YES"
gateway_enable="YES"
firewall_enable="YES"
firewall_type="OPEN"
firewall_script="/etc/rc.firewall"
firewall_flags=""
natd_enable="YES"
natd_program="/sbin/natd"
natd_interface="em0"
natd_flags=""
ifconfig_em0="inet 202.179.7.39 netmask 255.255.255.192"
defaultrouter="202.179.7.33" // extranal interface
hostname="yourserver.name"
ifconfig_rl0="inet 192.168.0.1 netmask 255.255.255.0" // internal interface