Simple Nginx proxy reverse configuration add the file proxy.conf in /etc/nginx/conf.d/ proxy_http_version 1.1; proxy_set_header Host $http_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_set_header Upgrade $http_upgrade; proxy_set_header Connection "Upgrade"; Configuration for the domain simple server { listen 80; listen [::]:80; server_name example.com; location / { include conf.d/proxy.conf; proxy_pass http://192.168.123.321:3000/; } }