alert ip [152.109.0.0/16,152.163.116.0/22,153.14.0.0/16,153.51.160.0/22,153.93.0.0/16,154.85.48.0/21,154.209.190.0/24,154.211.12.0/24,154.216.188.0/24,154.220.66.0/24,155.66.0.0/16,155.71.0.0/16,155.73.0.0/16,155.94.203.0/24,155.103.68.0/22,155.159.0.0/16,155.212.236.0/24,155.212.238.0/24,155.233.0.0/16,155.249.0.0/16] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 30"; 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:2400029; 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;)