alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"GPL WEB_SERVER _vti_rpc access"; flow:to_server,established; content:"/_vti_rpc"; http_uri; nocase; reference:bugtraq,2144; reference:cve,2001-0096; reference:nessus,10585; classtype:web-application-activity; sid:2100937; rev:13; metadata:created_at 2010_09_23, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)