ip route add blackhole 2620:0:403::/48
ip route add blackhole 128.5.0.0/20
ip route add blackhole 19.12.88.0/21
ip route add blackhole 19.12.96.0/20
ip route add blackhole 19.12.72.0/21
ip route add blackhole 19.12.112.0/20
ip route add blackhole 2620:0:402::/48
ip route add blackhole 19.12.136.0/21
ip route add blackhole 19.12.128.0/21