/etc/rc.local
ifconfig eth0 hw ether 00:00:F8:22:5C:BA
ifconfig eth0:1 192.168.167.161 broadcast 192.168.255.255 netmask 255.255.0.0 up
/sbin/iptables -t filter -I INPUT -p tcp -s ! 194.190.167.0/24 --destination-port 20:23 -j DROP
/sbin/iptables -t filter -I INPUT -p udp -s ! 194.190.167.0/24 --destination-port 20:23 -j DROP
/sbin/iptables -t filter -A INPUT -p tcp -s 194.190.167.26 --destination-port 20:23 -j ACCEPT
/sbin/iptables -t filter -A INPUT -p udp -s 194.190.167.26 --destination-port 20:23 -j ACCEPT
/sbin/iptables -t filter -A INPUT -p tcp -s 194.190.167.27 --destination-port 20:23 -j ACCEPT
/sbin/iptables -t filter -A INPUT -p udp -s 194.190.167.27 --destination-port 20:23 -j ACCEPT
/sbin/iptables -t filter -A INPUT -p tcp -s 194.190.167.160 --destination-port 20:23 -j ACCEPT
/sbin/iptables -t filter -A INPUT -p udp -s 194.190.167.160 --destination-port 20:23 -j ACCEPT