Reverse proxy using x-forwarded-for to back-end server with single visitor real wan IP

Hello all,

We are using Nginx to be a reverse proxy server to backend web server.
since need to log the visitor real wan IP address.


<pre> X-Forwarded-For: client, proxy1, proxy2</pre>

We only want to log the client wan IP and not pass the proxy1 , proxy2 ip address to backend web server

We tried configure as below, but not working.
proxy_set_header Forwarded $http_x_forwarded_for;

Any suggestion?