alert ip [156.247.54.0/24,157.20.182.0/23,157.115.0.0/16,157.119.64.0/22,157.148.116.0/24,157.162.0.0/16,157.186.0.0/16,158.94.208.0/22,158.173.51.0/24,158.249.0.0/16,159.80.0.0/16,159.219.0.0/16,160.14.0.0/16,160.65.0.0/16,160.104.0.0/16,160.116.0.0/16,160.117.0.0/16,160.121.0.0/16,160.122.0.0/16,160.180.0.0/16] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 34"; 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:2400033; 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;)