alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET SCAN Paros Proxy Scanner Detected"; flow:to_server,established; http.user_agent; content:"Paros/"; startswith; reference:url,www.parosproxy.org; classtype:attempted-recon; sid:2008187; rev:9; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, updated_at 2020_04_20;)