alert ip [109.238.86.0/23,110.34.48.0/22,110.44.144.0/20,110.48.0.0/18,110.48.0.0/16,110.48.136.0/22,110.48.148.0/22,110.48.192.0/18,110.172.192.0/20,111.66.64.0/18,111.68.64.0/19,111.90.140.0/23,111.90.142.0/23,111.90.156.0/24,111.90.157.0/24,111.223.244.0/24,112.90.143.0/24,112.142.0.0/15,112.142.160.0/22,112.143.0.0/19] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 24"; 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:2400023; rev:4813; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_08_28;)