How to set up support for fast file upload via Nginx for Bitrix?

Question

Nginx

Goodnight.
Faced a problem. There is a bitrix installation on nginx + apache + php You need to enable fast file upload through Nginx (x-accel-redirect) I read that nginx has this feature out of the box, but when passing the tests, bitrix gives an error. Support recommended to install their VM, but this option is not suitable. I would like to customize everything myself.
Where to dig? Maybe someone came across.

Answer 1

throw apache out of the bundle.

Answer 2

Is there nothing in the nginx error.log? In Bitrix, the test is the dumbest, to pass it and such a config is enough:

server {
  listen 1.2.3.4:80;
  server_name site.ru;

  location / {
    proxy_pass http://backend;
  }
}

Naturally, no "quick return" will work, but the test will pass successfully (=