alert ip [176.126.194.0/24,176.223.116.0/23,176.223.118.0/24,176.223.188.0/24,177.234.136.0/21,178.16.52.0/22,178.20.210.0/24,178.236.252.0/24,179.43.175.0/24,180.178.180.0/24,180.178.191.0/24,180.178.192.0/18,180.222.32.0/19,180.235.124.0/22,181.177.64.0/18,181.214.147.0/24,181.232.172.0/23,182.237.0.0/22,185.7.214.0/24,185.7.215.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 39"; 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:2400038; 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;)