无法连接到：连接被拒绝 - cURL PHP

Question

So here's the scenario.

1) On my local machine that is running MAMP, I'm not facing any issue and I'm able to successfully get the response along with CURLINFO_HTTP_CODE=200

2) However, there is a remote server on which my PHP code is deployed. If I try to run the same thing (as I've mentioned in #1) I get an error that says

curl_error = Failed to connect to my_ip port my_port: Connection refused with CURLINFO_HTTP_CODE = 7

$url = 'myURL';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT ,30); //timeout in seconds
curl_setopt($ch,CURLOPT_TIMEOUT, 20); // same for here. Timeout in seconds.
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json',
        'Content-Length: ' . strlen($data_string))
);

$data_string = {"name":"mark"} `