ipset -N myBlackhole-4 hash:net family inet
ipset -N myBlackhole-6 hash:net family inet6
ipset -A myBlackhole-4 147.241.48.0/21
ipset -A myBlackhole-4 147.241.144.0/21
ipset -A myBlackhole-6 2001:480:253::/48
ipset -A myBlackhole-4 147.241.64.0/21
ipset -A myBlackhole-4 147.241.136.0/21
iptables -A INPUT -m set --match-set myBlackhole-4 src -j DROP
ip6tables -A INPUT -m set --match-set myBlackhole-6 src -j DROP