alert ip [204.238.170.0/24,204.238.183.0/24,204.239.132.0/23,204.239.134.0/23,204.239.200.0/23,205.137.0.0/20,205.142.32.0/22,205.142.36.0/24,205.142.40.0/22,205.142.104.0/22,205.142.136.0/22,205.142.208.0/22,205.143.208.0/21,205.144.0.0/20,205.148.128.0/18,205.151.128.0/19,205.151.216.0/24,205.153.132.0/22,205.153.160.0/22,205.158.176.0/20] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 57"; 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:2400056; rev:4719; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_05_26;)