Can't get client's real IP when using Nginx reverse proxy

I had similar issue this is what i tried and it fixed my issue..

1. go to /etc/nginx/sites-available/you will found default file where you had configured your servers like this.

server{  server_name example.com;  location / {    proxy_pass http://localhost:4000;    proxy_set_header X-Real-IP $remote_addr; <---Add this line    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; <---this line too  }

2.there will be one more file named proxy_params in /nginx folder make sure you have below lines in this file.

proxy_set_header X-Real-IP $remote_addr;proxy_set_header X-Forwarded-For $remote_addrproxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

3. Most important in your back-end code get the IP like this.

const ipAddress = req.headers['x-forwarded-for'] as string;

You can also check the request ip through this command.

$ sudo tail -f /var/log/nginx/access.log

You may need to forward the original IP.Here is NGinx's doc on the subject: https://www.nginx.com/resources/wiki/start/topics/examples/forwarded/

And an example of the older x-forwarded-for from: https://plone.lucidsolutions.co.nz/web/reverseproxyandcache/setting-nginx-http-x-forward-headers-for-reverse-proxy

location / {  proxy_pass              http://upstream/;  proxy_set_header        Host               $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-Host   $host:443;  proxy_set_header        X-Forwarded-Server $host;  proxy_set_header        X-Forwarded-Port   443;  proxy_set_header        X-Forwarded-Proto  https;}