alert ip [204.239.132.0/23,204.239.134.0/23,204.239.200.0/23,205.137.0.0/20,205.142.40.0/22,205.142.104.0/22,205.142.136.0/22,205.142.208.0/22,205.144.0.0/20,205.148.128.0/18,205.151.128.0/19,205.151.216.0/24,205.153.132.0/22,205.153.160.0/22,205.159.26.0/24,205.159.174.0/24,205.159.201.0/24,205.159.241.0/24,205.166.77.0/24,205.166.84.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 63"; 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:2400062; rev:4888; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_11_11;)