alert ip [216.9.224.0/22,216.26.224.0/19,216.63.240.0/22,216.93.48.0/21,216.93.96.0/19,216.137.144.0/20,216.179.128.0/17,216.250.16.0/20,217.22.254.0/23,217.60.195.0/24,217.60.199.0/24,217.60.241.0/24,217.60.250.0/24,217.145.226.0/23,218.99.0.0/16,221.128.128.0/17,222.123.0.0/16,223.26.48.0/20,223.29.226.0/24,223.155.16.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 67"; 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:2400066; rev:4770; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_07_16;)