iptables -A INPUT -s 212.97.112.0/20 -j DROP
iptables -A INPUT -s 212.97.97.0/24 -j DROP
iptables -A INPUT -s 212.97.106.0/23 -j DROP
iptables -A INPUT -s 212.97.96.0/20 -j DROP
iptables -A INPUT -s 212.97.120.0/23 -j DROP
iptables -A INPUT -s 212.97.96.0/19 -j DROP