alert ip [202.79.173.0/24,202.95.7.0/24,202.95.8.0/21,202.122.64.0/19,202.131.208.0/20,202.148.32.0/20,202.152.192.0/20,202.159.80.0/20,202.168.80.0/22,202.183.0.0/19,202.189.80.0/20,203.9.0.0/19,203.26.150.0/24,203.91.73.0/24,203.132.96.0/19,203.159.90.0/24,203.160.52.0/22,203.171.224.0/20,203.188.171.0/24,203.189.234.0/23] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 56"; 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:2400055; 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;)