Unknown Firewall (375f9e297)

[WhatWaf-Firewalls]

WhatWaf version: 2.0.3
Running context: ./whatwaf -u *****************
Fingerprint:

<!--
GET http://yimg.com HTTP/1.1
Status code: 403
expect-ct: max-age=31536000, report-uri="http://csp.yahoo.com/beacon/csp?src=yahoocom-expect-ct-report-only"
x-xss-protection: 1; mode=block
content-security-policy: sandbox allow-scripts; default-src 'self'; img-src https:; style-src 'unsafe-inline'; script-src 'unsafe-inline'; report-uri http://csp.yahoo.com/beacon/csp?src=redirect
x-content-type-options: nosniff
x-amz-id-2: Voqfl2APGkQgGg8KBDlB1ZfOas1KfAwIygBkNA9Zu+WO0FS31QaEACDVpkwlLJ8J2OMlAabn7GI=
age: 1
strict-transport-security: max-age=31536000
server: ATS
transfer-encoding: chunked
connection: close
x-amz-request-id: E0FNX152EA7NSYNG
date: Mon, 02 Aug 2021 09:44:27 GMT
x-frame-options: DENY
referrer-policy: no-referrer-when-downgrade
content-type: text/html
-->
Upstream 403 Error