Unable to call Apple Push Notification service (APNS) through web service(php API). Here APNS service is called via proxy server?

Question

Unable to call Apple Push Notification service (APNS) through web service(php API). Here APNS service is called via proxy server. I am making APNS call in web service(php API). Here APNS service is called via proxy server. Because i can't make direct connection with apple server. We have restriction that can't able to connect other server/ URI directly from our live server. So, i have only possible to call other servers with the help of proxy. I'm getting the below error message while calling the web service,

Please find the error message to the API call.

stream_socket_client(): php_network_getaddresses: getaddrinfo failed: Temporary failure in name resolution

Please provide perfect solution to this issue.