alert ip [199.253.48.0/21,199.253.224.0/20,199.254.32.0/20,199.254.190.0/24,200.0.60.0/23,200.1.0.0/22,200.1.4.0/23,200.13.64.0/20,200.22.0.0/16,200.23.137.0/24,200.23.165.0/24,200.33.170.0/24,200.33.187.0/24,200.34.30.0/23,200.34.135.0/24,200.34.156.0/24,200.71.124.0/22,200.189.44.0/22,201.148.168.0/22,202.12.101.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 57"; 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:2400056; 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;)