alert ip [185.110.0.0/22,185.116.172.0/23,185.116.175.0/24,185.120.8.0/22,185.122.128.0/22,185.127.44.0/22,185.127.56.0/22,185.127.68.0/22,185.127.76.0/22,185.129.8.0/22,185.129.208.0/22,185.130.36.0/22,185.132.8.0/22,185.132.53.0/24,185.134.48.0/22,185.137.98.0/24,185.144.180.0/22,185.148.242.0/23,185.156.73.0/24,185.161.148.0/22] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 37"; 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:2400036; 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;)