ipset -N myBlackhole-4 hash:net family inet
ipset -N myBlackhole-6 hash:net family inet6
ipset -A myBlackhole-4 204.73.218.0/24
ipset -A myBlackhole-4 137.192.196.0/24
ipset -A myBlackhole-4 198.174.57.0/24
ipset -A myBlackhole-4 204.72.175.0/24
ipset -A myBlackhole-4 206.145.172.0/22
ipset -A myBlackhole-4 137.192.21.0/24
iptables -A INPUT -m set --match-set myBlackhole-4 src -j DROP
ip6tables -A INPUT -m set --match-set myBlackhole-6 src -j DROP