How to Fix Authorization Headers Problem in Apache 2.4 PHP-FPM?

Apache 2.4 PHP-FPM: Authorization Headers Problem

Issue:

Authorization headers are not being passed from Apache 2.4's mod_proxy to PHP-FPM, preventing access to certain features, such as APC's user cache monitoring.

Solution:

1. Identify the Stripping Module:

Determine which Apache module is stripping the Authorization headers. This may require extensive debugging or checking module configurations.

2. Override Module Settings:

Find the specific configuration setting within the problematic module that allows you to preserve the Authorization headers. This setting varies depending on the module.

3. Pass Headers via Env Variables:

If overriding module settings is not possible, you can pass the Authorization header directly to PHP using environment variables:

<code class="apache">SetEnvIf Authorization "(.*)" HTTP_AUTHORIZATION=</code>

4. Update PHP Code:

In some cases, you may need to modify your PHP code to access the Authorization header using $_SERVER['REDIRECT_HTTP_AUTHORIZATION'] instead of $_SERVER['HTTP_AUTHORIZATION'].

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