freebsd_ipfw_modules

mcedit /etc/rc.conf

gateway_enable="YES"
...
firewall_enable="YES"
firewall_script="/etc/ipfw.rules"
natd_enable="YES"
natd_interface="vmx0"
natd_flags="-f /etc/natd.conf"

mcedit /etc/ipfw.rules

/sbin/ipfw -f -q flush
...
/sbin/ipfw add 300 divert natd ip from any to any via vmx0
...
#/sbin/ipfw add 65534 allow ip from any to any

mcedit /etc/natd.conf

redirect_port tcp 192.168.44.116:3389 3389