alert ip [209.66.128.0/19,209.79.220.0/22,209.95.64.0/19,209.95.192.0/19,209.99.184.0/21,209.120.205.0/24,209.147.81.0/24,209.148.16.0/20,209.159.128.0/20,209.161.64.0/19,209.182.64.0/19,209.182.100.0/22,209.186.20.0/22,209.186.24.0/21,209.186.224.0/21,209.186.232.0/22,209.186.236.0/24,209.233.156.0/22,210.56.48.0/21,210.57.128.0/18] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 63"; 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:2400062; 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;)