How to correctly pass HTTP authorization through Nginx to Apache?

Question

Nginx

Hello! I ran into a problem that I can't figure out... How can I correctly pass HTTP authorization through Nginx to Apache? I have Nginx acting as a proxy_pass, passing all data to Apache. But, $_SERVER['PHP_AUTH_USER'] and $_SERVER['PHP_AUTH_PW'] return empty. How to be?
Here are the Nginx and Apache configs:

location / {
    proxy_pass http://10.0.20.20:8080;
    proxy_redirect        off;
    set_real_ip_from 10.0.20.20;
    real_ip_recursive on;
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_pass_header Set-Cookie;
    }

<VirtualHost 10.0.20.20:8080>
  ServerName domain.com

  ServerAdmin [email protected]
  DocumentRoot /var/www/domain.com/test-site/public

  ErrorLog ${APACHE_LOG_DIR}/svm-test-site_error.log
  CustomLog ${APACHE_LOG_DIR}/svm-test-site_access.log vhost_combined
  
  ProxyPassMatch "^/(.*\.php(/.*)?)$" "unix:/var/run/php/php7.4-fpm.sock|fcgi://localhost/var/www/domain.com/test-site/public"
  AccessFileName .htaccess
</VirtualHost>
<Directory /var/www/domain.com/test-site/public>
  Options +Includes +ExecCGI
  Options Indexes FollowSymLinks
  AllowOverride All
  Require all granted
</Directory>

Thanks in advance!

Answer 1

Nginx passes all received headers internally by default, nothing needs to be specially configured. Deal with Apache and PHP.