iptables -A INPUT -s 163.249.100.0/22 -j DROP
iptables -A INPUT -s 163.249.160.0/21 -j DROP
iptables -A INPUT -s 163.249.128.0/19 -j DROP
iptables -A INPUT -s 163.249.168.0/22 -j DROP
iptables -A INPUT -s 163.249.104.0/21 -j DROP
iptables -A INPUT -s 163.249.112.0/20 -j DROP
iptables -A INPUT -s 163.249.8.0/23 -j DROP