Bdtyktl

I'm unable to get the real ip of the client when accessing my apache web server which is behind an nginx reverse proxy. These are two virtual box machines. I'm using ubuntu 18.04 on both of them.
nginx reverse proxy: 192.168.80.53 and apache backend: 192.168.80.54

nginx configuration is this:

server {

    listen 443;

    server_name test3.de;

    ssl on;

    ssl_certificate /etc/ssl/crt/vinci-u18iptables.crt;

    ssl_certificate_key /etc/ssl/crt/vinci-u18iptables.key;



location / {

    proxy_pass http://test2.de;

    proxy_redirect off;

    proxy_set_header Host $host;

    proxy_set_header X-Forwarded-Host $host;

    proxy_set_header X-Forwarded-Server $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_connect_timeout 60;

    proxy_read_timeout 60;

    proxy_send_timeout 60;

    send_timeout 60;

    proxy_http_version 1.1;

    proxy_set_header Connection "";

  }

}

(test3.de is already associated with the apache backend in /etc/hosts on the nginx reverse proxy)
I've got the following configuration on apache.conf:

RemoteIPHeader X-Forwarded-For

LogFormat "%v:%p %a %l %u %t "%r" %>s %O referer: "%{Referer}i" "%{User-Agent}i"" vhost_combined

LogFormat "%a %l %u %t "%r" %>s %O referer: "%{Referer}i" "%{User-Agent}i"" combined

LogFormat "%a %l %u %t "%r" %>s %O" common

LogFormat "%{Referer}i -> %U" referer

LogFormat "%{User-agent}i" agent

remoteip_module is enabled.
I only have one single vhost enabled:

<VirtualHost *:80>

    ServerName test2.de

    ServerAdmin webmaster@localhost

    DocumentRoot /var/www/html

    ErrorLog ${APACHE_LOG_DIR}/error.log

    CustomLog ${APACHE_LOG_DIR}/access.log combined

</VirtualHost>

So, when accessing https://test3.de on my browser (on 192.168.80.109), I get the following in my apache backend:

192.168.80.53 - - [23/Jan/2019:14:47:38 +0000] "GET /info.php HTTP/1.1" 200 21788 referer: "-" "Mozilla/5.0 (X11; Linux x86_64)

AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/71.0.3578.98

Chrome/71.0.3578.98 Safari/537.36"

So, still the ip of the reverse proxy instead of 192.168.80.109.
Any ideas what I'm missing here? This is simple basic configuration.