cURL ip address - php

Question

I need to send a curl request with the user's ip address not the server one. I tried this with no luck:
curl_setopt( $ch, CURLOPT_INTERFACE, $ip );
Any ideas?

Answer 1

Ok, so there's no way to safely spoof the ip address of a curl request, but I found a non-safe way, it depends on the server script receiving the request, but it worked for me to trick the API I was making the request to:
curl_setopt( $ch, CURLOPT_HTTPHEADER, array("REMOTE_ADDR: $ip", "HTTP_X_FORWARDED_FOR: $ip"));
This won't always work, but in this case it worked for me.
Thanks everyone for the help!

Answer 2

It doesn't work with curl for me so i found a way around it, I just had to do this and as long as the IP is assigned to your server, then:
echo http_socket::download('http://something.com', '55.55.44.33');
final class http_socket
{
static public function download($url, $bind_ip = false)
{
$components = parse_url($url);
if(!isset($components['query'])) $components['query'] = false;
if(!$bind_ip)
{
$bind_ip = $_SERVER['SERVER_ADDR'];
}
$header = array();
$header[] = 'GET ' . $components['path'] . ($components['query'] ? '?' . $components['query'] : '');
$header[] = 'Host: ' . $components['host'];
$header[] = 'User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.7) Gecko/20100106 Ubuntu/9.10 (karmic) Firefox/3.5.7';
$header[] = 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8';
$header[] = 'Accept-Language: en-us,en;q=0.5';
$header[] = 'Accept-Encoding: gzip,deflate';
$header[] = 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7';
$header[] = 'Keep-Alive: 300';
$header[] = 'Connection: keep-alive';
$header = implode("\n", $header) . "\n\n";
$packet = $header;
//----------------------------------------------------------------------
// Connect to server
//----------------------------------------------------------------------
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
socket_bind($socket, $bind_ip);
socket_connect($socket, $components['host'], 80);
//----------------------------------------------------------------------
// Send First Packet to Server
//----------------------------------------------------------------------
socket_write($socket, $packet);
//----------------------------------------------------------------------
// Receive First Packet to Server
//----------------------------------------------------------------------
$html = '';
while(1) {
socket_recv($socket, $packet, 4096, MSG_WAITALL);
if(empty($packet)) break;
$html .= $packet;
}
socket_close($socket);
return $html;
}
}

Answer 3

Spoofing an IP address is not something cURL can do. That's a lower-level operation requiring manipulation of raw socket connections.

Answer 4

None of upper solutions has worked for me. However making a request through a proxy works very well:
$url = 'http://dynupdate.no-ip.com/ip.php';
$proxy = '127.0.0.1:8888'; //put your proxy here
//$proxyauth = 'user:password';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_PROXY, $proxy);
//curl_setopt($ch, CURLOPT_PROXYUSERPWD, $proxyauth);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
curl_close($ch);
echo $result;

Answer 5

here are the lines of php code which may work.
You may use any other method to set "X-Forwarded-For" header.
$httpClient = new Zend_Http_Client($reqUrl);
$httpClient->setHeaders("X-Forwarded-For","127.0.0.1"); //---this sets the desired ip address

Answer 6

That's because you are supposed to put your server's ip address there.
You cannot forge an IP packet with fake source address using curl.

Answer 7

Use HTTP_X_REAL_IP header in addition with HTTP_X_FORWARDED_FOR and REMOTE_ADDR like
"HTTP_X_REAL_IP: xxx.xxx.xxx.xx"

Answer 8

Use it into the header add tags like REMOTE_ADDR: majbase HTTP_X_FORWARDED_FOR: codix like "HTTP_X_REAL_IP: xxx.xxx.xxx.xx"