alert ip [198.240.64.0/18,198.241.64.0/18,198.244.32.0/21,198.244.40.0/22,198.244.44.0/23,198.244.46.0/24,198.246.162.0/24,198.252.32.0/19,198.252.174.0/24,199.1.24.0/21,199.5.16.0/21,199.5.24.0/23,199.5.135.0/24,199.5.152.0/23,199.5.194.0/24,199.5.229.0/24,199.26.137.0/24,199.26.207.0/24,199.26.251.0/24,199.33.146.0/24] 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: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;)