alert ip [199.178.168.0/23,199.180.8.0/22,199.180.12.0/23,199.180.14.0/24,199.184.0.0/21,199.184.8.0/22,199.184.12.0/23,199.184.82.0/24,199.184.223.0/24,199.185.144.0/20,199.186.26.0/23,199.187.16.0/21,199.187.24.0/22,199.187.32.0/20,199.187.48.0/21,199.196.192.0/19,199.198.160.0/20,199.198.176.0/21,199.198.184.0/23,199.198.188.0/22] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 50"; 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:2400049; 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;)