alert ip [134.122.128.0/17,134.122.168.0/24,134.122.188.0/24,134.122.189.0/24,134.195.104.0/22,136.230.0.0/16,137.42.0.0/16,137.59.60.0/22,137.72.0.0/16,137.105.0.0/16,137.218.0.0/16,137.220.128.0/17,138.36.92.0/22,138.36.136.0/22,138.59.4.0/22,138.59.204.0/22,138.94.216.0/22,138.97.156.0/22,138.99.36.0/22,138.125.0.0/16] 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: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;)