Default Konfiguration ansehen:
  egrep  -v '^\s*(#|$)' /etc/nginx/sites-available/default

====== nginx als Reverse Proxy ======
  cd /etc/nginx/sites-available
  mv default orig
''default'' :
<file>
server {
    location / {
        proxy_pass http://www.linuxhotel.de:80;
    }
}
</file>

==== Konfiguration testen ====
  nginx -t

==== reload ====
  nginx -s reload

===== Header setzen =====
<file>
server {
    location / {
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_pass http://www.linuxhotel.de:80;
    }
}
</file>

===== Lastverteilung =====
<file>
upstream loadbalance {
  server 192.168.222.11;
  server 192.168.210.10;
  server 192.168.229.225;
  server 192.168.232.101;
}
server {
    location / {
        proxy_pass http://loadbalance;
    }
}
</file>

====== Dokumentation ======

https://docs.nginx.com/nginx/admin-guide/web-server/reverse-proxy/