Private IP of client machine from website

Question

Dear All, how can I get the private ip of client system from a website hosted on public ip in ASP.Net C#? while i am checking userhostname , it's showing the global IP of the Internet connectivity which is the same for all the machines in the network. Please advice me.

Thanks in Advance

Anoop George Thomas

Answer 1

Short answer is no, not from the server side. You may be able to write client-side code that looks up the system's actual IP address, though you may need to do it by way of a browser plugin.

A better question is "Why do you need do to that?" Generally, if you have to have the internal IP, you are doing something wrong.

Answer 2

Unfortunately, it's not something you'll be able to pull.

Now, you can grab an IP of a machine that's coming through a proxy or other some such forwarding device. Here's an example function that utilizes the HTTP_CLIENT_IP and the HTTP_X_FORWARDED_FOR IP if they are available in your server environment.

<?php

function getIP(){
    if (!empty($_SERVER['HTTP_CLIENT_IP'])){
      $ip = $_SERVER['HTTP_CLIENT_IP'];
    }else if(!empty($_SERVER['HTTP_X_FORWARDED_FOR'])){
      $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
    }else{
      $ip = $_SERVER['REMOTE_ADDR'];
    }

    return $ip;
}


echo getIP();

?>