iptables -A INPUT -s 194.77.240.0/21 -j DROP
iptables -A INPUT -s 194.77.238.0/23 -j DROP
iptables -A INPUT -s 194.77.240.0/20 -j DROP
iptables -A INPUT -s 194.77.248.0/21 -j DROP
iptables -A INPUT -s 194.77.236.0/22 -j DROP
iptables -A INPUT -s 194.77.236.0/23 -j DROP