redirect guest who are not logged in to HTTP 404 page instead of worpress error

Use your .htaccess to handle 404’s.

ErrorDocument 404 /404.html

*Insert this before WordPress’ rules.

It doesn’t work. I have inserted it in root directory .htaccess. But it shows in the page “please login to continue” and in address bar it shows like this “https://mydomain.com/redirect_to=http%3A%2F%2Fmydomain.com%2Fwp-admin%2F&reauth=1”. I am not getting what I expected. Is there any code to redirect users who are not logged in to 404 page if they try to access wp-admin. I did for logged in users except administrator with this code
add_action(‘admin_init’, ‘no_mo_dashboard’);
function no_mo_dashboard() {
global $wp_query;
if (!current_user_can(‘manage_options’) && $_SERVER[‘DOING_AJAX’] != ‘/wp-admin/admin-ajax.php’) {
$wp_query->set_404();
status_header( 404 );
get_template_part( 404 ); exit();
}
}

which redirects all users except administrator.

I inserted this code in functions.php

I see. You can use the conditional is_user_logged_in

I did it also gives me the same result.

You did what? Post the updated code so I can see.

And Put code in between backticks. Please.

if ($_SERVER['DOING_AJAX'] != '/wp-admin/admin-ajax.php' && !is_user_logged_in()) {
  $wp_query->set_404();
  status_header( 404 );
  get_template_part( 404 ); exit();
  }
}

Am I doing it right?

add_action('admin_init', 'no_mo_dashboard');
function no_mo_dashboard() {
  global $wp_query;
  if (!current_user_can('manage_options') && !is_user_logged_in() && $_SERVER['DOING_AJAX'] != '/wp-admin/admin-ajax.php') {
  $wp_query->set_404();
  status_header( 404 );
  get_template_part( 404 ); exit();
  }
}

also did that

Your &&’s are making it not work. Precedence isn’t being set correctly. In that statement, all three have to be true. Have you tried it like this:

function no_mo_dashboard() {
		    global $wp_query;

		    // if ajax request is being made, or administrator, return
		    if( (defined('DOING_AJAX') && DOING_AJAX ) || current_user_can( 'manage_options' ) )
		  		return;

			$wp_query->set_404();
			status_header( 404 );
			get_template_part( 404 ); exit();
		}

I am getting a syntax error with that. sorry

I am designing my wordpress website and I want nobody should know that I am using wordpress for my site.

All they have to do is look at the source code to see it is WordPress.

Its not the point. Point is if someone break the rules i should redirct them to error page so that he could be banned because i set a ban limt for that error.

What rules are they breaking?