alert ip [205.236.185.0/24,205.236.189.0/24,205.237.8.0/24,205.237.10.0/23,205.237.12.0/22,205.237.16.0/22,206.41.128.0/20,206.41.160.0/19,206.51.29.0/24,206.80.224.0/21,206.83.128.0/21,206.121.28.0/22,206.121.32.0/23,206.123.145.0/24,206.123.156.0/24,206.125.16.0/20,206.130.180.0/24,206.130.188.0/24,206.130.237.0/24,206.130.240.0/24] 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:4769; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_07_15;)