alert ip [160.117.0.0/16,160.121.0.0/16,160.122.0.0/16,160.180.0.0/16,160.188.0.0/16,160.240.0.0/16,161.0.0.0/19,161.0.68.0/22,161.1.0.0/16,161.60.0.0/16,161.248.6.0/23,161.248.178.0/23,162.71.0.0/19,162.217.160.0/21,162.249.20.0/22,163.5.102.0/24,163.47.19.0/24,163.50.0.0/16,163.61.216.0/24,163.198.0.0/16] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 33"; 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:2400032; 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;)