iptables -A INPUT -s 64.38.0.0/18 -j DROP
iptables -A INPUT -s 64.57.208.0/20 -j DROP
iptables -A INPUT -s 72.36.224.0/19 -j DROP
iptables -A INPUT -s 198.28.28.0/22 -j DROP
iptables -A INPUT -s 72.232.144.0/21 -j DROP
iptables -A INPUT -s 206.55.112.0/20 -j DROP
iptables -A INPUT -s 198.54.240.0/22 -j DROP
iptables -A INPUT -s 199.58.108.0/22 -j DROP