alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY CURL User Agent"; flow:established,to_server; http.user_agent; content:"curl"; depth:100; nocase; reference:url,curl.haxx.se; classtype:attempted-recon; sid:2002824; rev:11; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_06;)