**client ip address

[Anon]

I use the following code to get a clients ip that comes to my webpage.

<php
if (getenv(HTTP_X_FORWARDED_FOR)) {
$ip = getenv('HTTP_X_FORWARD_FOR');
$host = gethostbyaddr($ip);
} else {
$ip = getenv('REMOTE_ADDR');
$host = gethostbyaddr($ip);
}
?>

The first part makes sure I don't get the IP of the ISP Cache Server. Now this code works fine.... unless someone is behind a router or firewall, then it just returns blank.

I want code that will get the ip no matter what. Maybe that first part is messing it up. I've seen clients written in other languages that can get the ip no matter what....like if you were behind a firewall your ip would show up as 24.209.14.35/192.168.0.1 or something...that would be sweet.

thanks boyz

[Anon]

What's the point of the proxy if outsiders can get insider's IP addresses?

The clients you mention that are able to get the IPs, run on the user's machine, right? So they don't have to go thru the firewall to get the IP. PHP though, will have to go thru the firewall, and it won't let it get the IP.

Diego

[Anon]

that's a very good point... and yes, the software where i have seen internal ip's was installed on the client, so forget internal ip's.

BUT! I should still be able to get the firewall/proxy ip they are behind...but that code returns blank.

[Anon]

I think if i take out the first part of the if statement that tests if it's the cache server/firewall/proxy, I will always get the main ip from a client.