nginx authorization with cookie (Staging servers)

nginx_cookie_restriction.conf

location /access {
    # set that special cookie, when everything is ok
    add_header Set-Cookie "access=1;max-age=3153600000;path=/";
    default_type text/html;

    return 301 /;
}

location / {
    if ($cookie_access != 1) {
            return 401;
    }

    try_files $uri $uri/ /index.php$is_args$args;
}