ipset -N myBlackhole-4 hash:net family inet
ipset -N myBlackhole-6 hash:net family inet6
ipset -A myBlackhole-4 103.235.77.0/24
ipset -A myBlackhole-4 103.74.22.0/24
ipset -A myBlackhole-4 103.74.21.0/24
ipset -A myBlackhole-4 103.74.20.0/24
ipset -A myBlackhole-4 103.74.23.0/24
iptables -A INPUT -m set --match-set myBlackhole-4 src -j DROP
ip6tables -A INPUT -m set --match-set myBlackhole-6 src -j DROP