alert ip [81.28.110.0/24,81.30.98.0/24,81.30.107.0/24,81.94.150.0/24,81.94.159.0/24,82.135.156.0/23,82.135.228.0/22,82.152.234.0/24,82.152.241.0/24,82.163.28.0/22,83.175.0.0/18,83.217.208.0/24,83.217.209.0/24,83.218.218.0/24,84.54.33.0/24,85.11.167.0/24,85.114.120.0/21,85.121.4.0/24,85.158.149.0/24,85.203.26.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 13"; 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:2400012; rev:4888; metadata:affected_product Any, attack_target Any, deployment Perimeter, tag Dshield, signature_severity Minor, created_at 2010_12_30, updated_at 2026_11_11;)