alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"GPL WEB_SERVER DELETE attempt"; flow:to_server,established; http.method; content:"DELETE"; nocase; reference:nessus,10498; classtype:web-application-activity; sid:2101603; rev:14; metadata:created_at 2010_09_23, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_21;)