alert ip [2.57.234.0/23,2.58.56.0/24,2.59.152.0/24,2.59.153.0/24,5.42.92.0/24,5.101.82.0/24,5.101.86.0/24,5.105.220.0/24,5.133.101.0/24,5.183.60.0/22,5.188.236.0/23,5.230.195.0/24,5.252.153.0/24,14.128.32.0/20,14.128.48.0/21,14.152.94.0/24,23.129.252.0/23,23.137.100.0/24,23.146.240.0/24,23.146.241.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 1"; 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:2400000; 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;)