alert http $EXTERNAL_NET any -> any any (msg:"🐾 - ℹ Netcraft - HTTP User-Agent Scanner 🕵"; flow:to_server, stateless; threshold:type limit, track by_src,count 1, seconds 86400; http.user_agent; content:"Mozilla/5.0"; startswith; content:"NetcraftSurveyAgent/"; content:"info|40|netcraft.com"; reference:url,https://www.netcraft.com/; metadata:created_at 2022_08_03, updated_at 2022_08_03; sid:3300988; rev:1; classtype:misc-activity;)