Add a group of Ips to csf

ip gropu 109.66.0.0 - 109.66.255.255

csf -a 109.66.0.0/16 will allow x.x.x.x i.w 109.66.0.0 to 255.255.255.255

csf -a 109.66.0.0/8 will allow 109.x.x.x

iptables
290 iptables -I INPUT -s 79.176.0.0/16 -j ACCEPT

/etc/init.d/iptables save
/etc/init.d/iptables restart