alert ip [192.88.118.0/24,192.88.120.0/24,192.88.122.0/24,192.88.128.0/24,192.88.129.0/24,192.88.130.0/24,192.88.131.0/24,192.88.133.0/24,192.94.211.0/24,192.94.240.0/24,192.96.87.0/24,192.96.146.0/24,192.100.88.0/24,192.101.44.0/24,192.101.181.0/24,192.101.187.0/24,192.101.200.0/21,192.101.208.0/20,192.101.224.0/20,192.101.240.0/21] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 40"; 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:2400039; 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;)