ipset -N myBlackhole-4 hash:net family inet
ipset -N myBlackhole-6 hash:net family inet6
ipset -A myBlackhole-4 103.100.246.0/24
ipset -A myBlackhole-4 103.100.247.0/24
ipset -A myBlackhole-6 2405:bc0:8000::/48
ipset -A myBlackhole-6 2405:bc0::/33
iptables -A INPUT -m set --match-set myBlackhole-4 src -j DROP
ip6tables -A INPUT -m set --match-set myBlackhole-6 src -j DROP