alert http $EXTERNAL_NET any -> $HTTP_SERVERS any (msg:"GPL EXPLOIT ISAPI .ida attempt"; flow:to_server,established; http.uri; content:".ida?"; nocase; reference:arachnids,552; reference:bugtraq,1065; reference:cve,2000-0071; classtype:web-application-attack; sid:2101243; rev:14; metadata:created_at 2010_09_23, cve CVE_2000_0071, signature_severity Major, updated_at 2020_04_22;)