alert ip [103.184.162.0/23,103.185.134.0/23,103.185.162.0/23,103.192.228.0/22,103.193.148.0/24,103.193.150.0/24,103.193.184.0/22,103.195.144.0/22,103.198.36.0/22,103.200.28.0/22,103.209.192.0/22,103.212.32.0/22,103.215.80.0/22,103.228.60.0/22,103.228.196.0/22,103.229.124.0/22,103.230.24.0/22,103.231.12.0/22,103.232.36.0/22,103.232.200.0/22] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 22"; 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:2400021; 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;)