alert ip [45.15.21.0/24,45.42.80.0/20,45.56.192.0/23,45.56.194.0/24,45.56.200.0/22,45.64.52.0/22,45.64.74.0/23,45.65.32.0/22,45.66.118.0/24,45.74.0.0/18,45.74.3.0/24,45.74.7.0/24,45.74.10.0/24,45.74.16.0/24,45.74.21.0/24,45.74.40.0/24,45.74.47.0/24,45.74.52.0/24,45.74.59.0/24,45.74.61.0/24] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 6"; 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:2400005; 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;)