ipset -N myBlackhole-4 hash:net family inet
ipset -N myBlackhole-6 hash:net family inet6
ipset -A myBlackhole-4 185.16.20.0/23
ipset -A myBlackhole-6 2a03:cbc0::/29
ipset -A myBlackhole-4 185.16.20.0/22
ipset -A myBlackhole-4 185.16.22.0/23
iptables -A INPUT -m set --match-set myBlackhole-4 src -j DROP
ip6tables -A INPUT -m set --match-set myBlackhole-6 src -j DROP