alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET POLICY Possible Web Crawl using Wget"; flow:established,to_server; threshold:type both, track by_src, count 10, seconds 60; http.user_agent; content:"Wget"; nocase; reference:url,www.gnu.org/software/wget/; classtype:attempted-recon; sid:2002823; rev:13; metadata:created_at 2010_07_30, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_27;)