Docusign api Connect - php

Question

I am experiencing connection problems to demo API
https://demo.docusign.net/restapi
To connect to API I am using the code provided below. It works well for my colleague from US, but when I try to connect from Lithuania there is zero response. Could it be there any location restrictions, or am I missing something?
Should it be some specifics in fire wall (I am under NAT)? Does my local php/http server needs some specific configuration?
$email = "some email # fsdfdsf";
$integratorKey = "TEST-xxxxxxxxxxx";
$password = "some password";
$url = "https://demo.docusign.net/restapi/v2/login_information?include_account_id_guid=true";
$header = "<DocuSignCredentials><Username>" . $email . "</Username><Password>" . $password . "</Password><IntegratorKey>" . $integratorKey . "</IntegratorKey></DocuSignCredentials>";
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_HEADER, false);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, array("X-DocuSign-Authentication: $header"));
$json_response = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if($status==200){
$response = json_decode($json_response, true);
print_r(json_encode($response['loginAccounts'][0]));
}else{
print_r($json_response);
}

Answer 1

I found a what was stopping to work a source code above.
On my local server ssl was not signed.
So simple and only in test environment quick fix could be to turn off ssl checking on curl:
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
or get a signed ssl sertificate.

Answer 2

This is how I solved it, I added $config->setSSLVerification(false); tu turn off ssl verification
$username = "marko#XXX.com";
$password = "XXX";
$integrator_key = "some_key";
// change to production before going live
//https://www.docusign.net/restapi
//https://www.docusign.com/p/RESTAPIGuide/Content/GettingStarted/REST%20API%20Version.htm
$host = "https://demo.docusign.net/restapi";
// create a new DocuSign configuration and assign host and header(s)
$config = new \DocuSign\eSign\Configuration();
$config->setHost($host);
$config->setSSLVerification(false);
$config->addDefaultHeader("X-DocuSign-Authentication", "{\"Username\":\"" . $username . "\",\"Password\":\"" . $password . "\",\"IntegratorKey\":\"" . $integrator_key . "\"}");
// instantiate a new docusign api client
$apiClient = new \DocuSign\eSign\ApiClient($config);

Answer 3

DocuSign does not implement any location restrictions for API clients.
You can check that your firewall is allowing connections to DocuSign by trying to use the service from your web browser. Try demo.docusign.net
You can also use your browser to directly access a method in the API server that provides information on the API service points.
If it works then you know the problem is in your API code.
If so, first try one of the API recipes.
If you can't access the web service then check your firewall settings.