iptables -A INPUT -s 103.210.121.0/24 -j DROP
iptables -A INPUT -s 103.175.188.0/24 -j DROP
iptables -A INPUT -s 103.210.122.0/24 -j DROP
iptables -A INPUT -s 103.175.189.0/24 -j DROP
iptables -A INPUT -s 103.55.227.0/24 -j DROP
iptables -A INPUT -s 103.210.120.0/24 -j DROP
iptables -A INPUT -s 103.210.123.0/24 -j DROP