alert http $HTTP_SERVERS $HTTP_PORTS -> $EXTERNAL_NET any (msg:"ET ATTACK_RESPONSE RFI Scanner detected"; flow:established,from_server; content:"RFI Scanner"; reference:url,www.rfxn.com/vdb.php; classtype:web-application-activity; sid:2007653; rev:6; metadata:created_at 2010_07_30, signature_severity Unknown, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2019_07_26;)