alert ip [91.243.93.0/24,91.246.43.0/24,91.246.176.0/21,92.63.197.0/24,92.87.6.0/24,92.118.39.0/24,92.242.62.0/24,92.255.57.0/24,92.255.85.0/24,93.90.72.0/23,93.92.72.0/21,93.114.51.0/24,93.114.52.0/23,93.114.54.0/24,93.114.55.0/24,93.114.58.0/23,93.114.99.0/24,93.114.187.0/24,93.115.59.0/24,93.119.118.0/23] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 16"; 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:2400015; rev:4813; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_08_28;)