alert ip [87.121.84.0/24,87.228.25.0/24,87.228.109.0/24,87.228.110.0/24,87.251.79.0/24,88.214.50.0/24,89.18.16.0/22,89.18.20.0/22,89.23.126.0/24,89.32.41.0/24,89.32.43.0/24,89.32.170.0/24,89.32.202.0/24,89.33.46.0/23,89.33.134.0/24,89.33.206.0/24,89.33.250.0/23,89.33.254.0/23,89.34.0.0/24,89.34.4.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 15"; 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:2400014; 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;)