alert ip [120.128.192.0/18,120.129.0.0/17,120.129.128.0/17,120.130.0.0/16,120.130.128.0/18,120.233.59.0/24,121.14.35.0/24,121.127.233.0/24,121.234.236.0/24,122.0.196.0/22,122.0.216.0/22,122.0.240.0/22,122.0.244.0/22,122.10.112.0/21,122.129.0.0/18,123.108.108.0/22,123.136.80.0/20,123.136.92.0/22,123.242.0.0/17,123.253.204.0/22] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 26"; 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:2400025; 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;)