alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY python.urllib User Agent Web Crawl"; flow:established,to_server; http.user_agent; content:"python.urllib/"; nocase; threshold:type both, track by_src, count 10, seconds 60; reference:url,docs.python.org/lib/module-urllib.html; classtype:attempted-recon; sid:2002943; rev:12; metadata:created_at 2010_07_30, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_11;)