alert ip [95.164.162.0/24,95.169.180.0/24,96.31.94.0/24,98.98.195.0/24,101.0.16.0/20,101.36.96.0/19,101.99.75.0/24,101.99.76.0/24,101.99.93.0/24,101.99.94.0/24,101.99.95.0/24,101.134.0.0/15,101.192.68.0/22,101.192.72.0/22,101.192.84.0/22,101.192.88.0/22,101.192.92.0/22,101.193.100.0/22,101.193.104.0/22,101.193.116.0/22] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 17"; 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:2400016; 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;)