Get the users Local IP of the visitor

Question

We have one internet line shared with multiple users and when everyone access the internet the request are sent through same remote IP. I need to find out the request is coming from which local IP. can anybody please help me to find out the local IP.

I have already written below code but it not giving the excepted result.

Thanks.

$ip = getenv('HTTP_CLIENT_IP');
var_dump($ip); 
var_Dump($_SERVER["X-FORWARDED-FOR"]);
    if (getenv('HTTP_X_FORWARDED_FOR')) {
        $pipaddress = getenv('HTTP_X_FORWARDED_FOR');
        $ipaddress = getenv('REMOTE_ADDR');
echo "Your Proxy IP address is : ".$pipaddress. "(via $ipaddress)" ;
    } else {
        $ipaddress = getenv('REMOTE_ADDR');
        echo "Your IP address is : $ipaddress";
    }

possible duplicate of [What is the most accurate way to retrieve a user's correct IP address in PHP?](http://stackoverflow.com/questions/1634782/what-is-the-most-accurate-way-to-retrieve-a-users-correct-ip-address-in-php) — Daan, Aug 04 '14 at 14:40
Is your router actually exposing the internal IP? My guess would be: no. Then there's nothing you can do. It wouldn't be trustworthy anyway. — deceze, Aug 04 '14 at 14:46

score 2 · Accepted Answer · answered Aug 04 '14 at 14:46

Since you all share the same public IP within the local network, your router uses a technique called NAT so you can share all the same ip(s), because it can be one, or several. The relation between requests and local ip is saved in a local table in the router acting as gateway.

You CAN NOT view the local ip address behind a NAT performing router. It is not a NAT problem, it is Internet addressing and packet header limitation, nothing to do with configurations you could deal with.

If this is a corporate trouble, you could do it placing the server in your local network and in that case, the $_SERVER['REMOTE_ADDR'] value will be the local IP address you are looking for.

Get the users Local IP of the visitor

1 Answers1