ip route add blackhole 186.251.212.0/24
ip route add blackhole 186.251.213.0/24
ip route add blackhole 186.251.209.0/24
ip route add blackhole 186.251.210.0/24
ip route add blackhole 186.251.208.0/24
ip route add blackhole 186.251.214.0/24
ip route add blackhole 186.251.211.0/24
ip route add blackhole 186.251.215.0/24