alert ip [170.113.0.0/16,170.130.10.0/23,170.130.43.0/24,170.179.0.0/16,170.247.220.0/22,171.26.0.0/16,172.94.0.0/17,172.94.9.0/24,172.111.128.0/17,172.111.246.0/24,172.247.38.0/24,173.44.0.0/19,173.239.214.0/24,173.239.224.0/24,173.244.55.0/24,175.103.64.0/18,176.65.132.0/24,176.65.134.0/24,176.65.139.0/24,176.65.144.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 38"; 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:2400037; 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;)