alert ip [206.197.77.0/24,206.197.166.0/24,206.197.171.0/24,206.197.226.0/24,206.209.48.0/20,206.209.80.0/20,206.209.192.0/20,206.221.0.0/20,206.221.96.0/20,206.221.192.0/20,206.223.33.0/24,206.224.160.0/19,206.225.64.0/22,206.226.0.0/19,206.226.32.0/19,206.251.50.0/24,206.251.56.0/22,207.22.192.0/18,207.45.56.0/21,207.45.96.0/21] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 64"; 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:2400063; 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;)