ipset -N myBlackhole-4 hash:net family inet
ipset -N myBlackhole-6 hash:net family inet6
ipset -A myBlackhole-4 177.20.0.0/17
ipset -A myBlackhole-4 177.20.17.0/24
ipset -A myBlackhole-4 177.20.19.0/24
ipset -A myBlackhole-4 177.20.18.0/24
ipset -A myBlackhole-4 177.20.100.0/24
iptables -A INPUT -m set --match-set myBlackhole-4 src -j DROP
ip6tables -A INPUT -m set --match-set myBlackhole-6 src -j DROP