PHP cURL cannot connect to IIS on local machine - php

Question

I have a PHP script that tries to connect with an other PHP script located on a IIS installation running on a local machine in my office using the cURL protocol but fails to do so.
Local configuration:
I've opened the port 8789 on the firewall, I made the router redirect correctly to the IP of the machine running IIS and I've set the default port of IIS to 8789.
If I try to connect to the script (93.144.xxx.xxx:8987/curl_response.php) through a browser I get the resulting output so this setup is working correctly.
When I try to run the PHP script on a remote webserver though it gives my either cUrl error (#7): couldn't connect to host or cUrl error (#28): connect() timed out! (I'm trying different webservers)
The curl part of my PHP script is the following:
$url = 'http://93.144.xxx.xxx:8789/curl_response.php';
$verbose = fopen('php://temp', 'w+');
$curl = curl_init();
curl_setopt ($curl, CURLOPT_VERBOSE, true);
curl_setopt ($curl, CURLOPT_STDERR, $verbose);
curl_setopt ($curl, CURLOPT_URL, $rurl);
curl_setopt ($curl, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt ($curl, CURLOPT_HEADER, 0);
curl_setopt ($curl, CURLOPT_RETURNTRANSFER, false);
curl_setopt ($curl, CURLOPT_PORT , 8789);
$response = curl_exec($curl);
if ($response === FALSE) {
printf("cUrl error (#%d): %s<br>\n", curl_errno($curl),
htmlspecialchars(curl_error($curl)));
rewind($verbose);
$verboseLog = stream_get_contents($verbose);
echo "Verbose information:\n<pre>", htmlspecialchars($verboseLog),"</pre>\n";
}else{
curl_close($curl);
// trim response (serialized array)
$response = trim($response);
// unserialize
$response = unserialize($response);
print_r($response);
}
I've tried several different CURLOPT_ configurations and I've even tried using a dyndns host instead of the IP, but to no avail.
Is there a IIS configuration to set so it will accept incomming cURL requests or is there a specific header to be sent though cURL?
Thanks.

Answer 1

You have a typo:
curl_setopt ($curl, CURLOPT_URL, $rurl);
Should be:
curl_setopt ($curl, CURLOPT_URL, $url);
Here's an example of a working curl request:
<?php
$url = 'http://thepointless.com:80/';
$curl = curl_init();
curl_setopt ($curl, CURLOPT_VERBOSE, true);
curl_setopt ($curl, CURLOPT_URL, $url);
curl_setopt ($curl, CURLOPT_CONNECTTIMEOUT, 10);
curl_setopt ($curl, CURLOPT_HEADER, 0);
curl_setopt ($curl, CURLOPT_RETURNTRANSFER, false);
curl_setopt ($curl, CURLOPT_PORT , 80);
$response = curl_exec($curl);
print $response;
?>
It's just like yours, except three things:
It's connecting to port 80
It's not setting STDERR
The typo is fixed

Answer 2

Run cURL from the command line with --verbose to see more detailed information.
And check if ISS it's with cURL enabled:
extension=php_curl.dll