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Apache 2.4, PHP-FPM, and Authorization Headers Misconfiguration
A common issue with Apache 2.4's mod_proxy is the failure to pass Authorization headers to PHP-FPM, hindering access to certain features. This problem arises due to security concerns within Apache modules.
To overcome this obstacle, Apache provides various modules with obscure settings that allow users to override this behavior. However, identifying the responsible module requires careful examination.
An alternative solution is to manually pass the header to PHP via the environment variable:
SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=
However, even this approach may fail in certain scenarios. In such cases, it is necessary to modify PHP code to retrieve the header from $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] instead of $_SERVER['HTTP_AUTHORIZATION'].
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