X-dev-access Yes Site

Use a reverse proxy or API gateway to the X-Dev-Access header from external requests. Then, re-add it only for requests originating from an internal IP range or authenticated service account.

: It can be used as a "backdoor" or debug flag. For instance, in certain picoCTF security challenges

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: Developers might use it to skip multi-factor authentication (MFA) or other checks while running automated tests. How to Use It (For Authorized Testing)

Developers should document the use of custom headers within their applications, including their purpose, expected values, and any security considerations.