ip route add blackhole 193.0.22.0/23
ip route add blackhole 193.0.0.0/21
ip route add blackhole 2001:67c:2e8::/48
ip route add blackhole 193.0.18.0/23
ip route add blackhole 193.0.10.0/23
ip route add blackhole 193.0.12.0/23
ip route add blackhole 193.0.20.0/23