alert ip [193.221.200.0/23,193.233.112.0/23,193.233.200.0/24,193.233.255.0/24,193.239.154.0/23,193.242.153.0/24,193.243.0.0/17,194.0.234.0/24,194.11.246.0/24,194.26.29.0/24,194.26.69.0/24,194.26.192.0/24,194.38.20.0/22,194.38.21.0/24,194.38.22.0/24,194.41.60.0/23,194.62.244.0/22,194.85.250.0/24,194.145.227.0/24,195.10.205.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 43"; 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:2400042; rev:4719; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_05_26;)