alert ip [64.116.200.0/21,64.204.37.0/24,64.205.156.0/22,64.205.164.0/22,64.205.172.0/22,64.205.188.0/22,64.250.144.0/20,65.166.249.0/24,65.205.64.0/22,65.216.208.0/21,66.6.59.0/24,66.198.225.0/24,67.219.208.0/20,69.33.250.0/23,69.33.252.0/22,69.40.207.0/24,69.165.0.0/20,74.0.80.0/22,74.0.92.0/22,74.2.112.0/22] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 11"; reference:url,www.spamhaus.org/drop/drop.txt; threshold:type limit, track by_src, seconds 3600, count 1; classtype:misc-attack; flowbits:set,ET.Evil; flowbits:set,ET.DROPIP; sid:2400010; rev:4888; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_11_11;)