alert ip [204.107.208.0/24,204.110.8.0/21,204.110.144.0/20,204.115.128.0/21,204.124.0.0/22,204.126.32.0/20,204.126.48.0/21,204.126.56.0/22,204.126.60.0/23,204.126.244.0/23,204.128.32.0/20,204.128.151.0/24,204.128.180.0/24,204.130.16.0/20,204.130.134.0/24,204.130.195.0/24,204.140.104.0/21,204.140.112.0/21,204.140.120.0/22,204.146.240.0/20] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 55"; 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:2400054; 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;)