alert ip [206.251.56.0/22,207.22.192.0/18,207.45.56.0/21,207.45.96.0/21,207.45.104.0/21,207.45.224.0/20,207.70.192.0/19,207.89.18.0/24,207.105.108.0/22,207.110.64.0/18,207.180.58.0/24,207.183.64.0/19,207.183.96.0/20,207.183.192.0/19,207.228.200.0/22,207.244.0.0/18,207.252.136.0/21,208.75.88.0/22,208.90.32.0/21,208.98.64.0/18] any -> $HOME_NET any (msg:"ET DROP Spamhaus DROP Listed Traffic Inbound group 68"; 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:2400067; 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;)