alert ip [192.195.187.0/24,192.203.188.0/24,192.203.252.0/24,192.206.114.0/24,192.207.169.0/24,192.226.16.0/20,192.229.32.0/19,192.231.66.0/24,192.231.100.0/24,192.231.165.0/24,192.234.55.0/24,192.234.156.0/24,192.234.189.0/24,192.234.220.0/24,192.245.101.0/24,192.245.188.0/24,192.245.248.0/24,192.251.231.0/24,192.252.16.0/20,192.252.176.0/20] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 43"; 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:2400042; 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;)