title: "Use of closed network connection."
body: <p>Our web service developer is getting a "<code>DeliveryPoint=Unknown Failed:  error on connection with 17.172.233.147:2195: Use of closed network connection. Will retry in 20s</code>" on my Push Notification Service using Uniqush. I cannot seem to detect which is the problem. Is this a problem with the pem/p12 files or the server cannot reach the Apple gateway? I am not very experienced in push notifications. What could be the common problems if the problem is the pem/p12 files? He is saying that it's the pem/p12 files causing the error. I suspect it is the server where the push notification service is being ran. I tested my pem/p12 files on Pushbots, a popular push notification service and I can receive push notifications with it. So it is a strong guess that the problem is on the push noticication server side.</p>
  
  <p>I also cannot use the tag "Uniqush" here on stackoverflow, it doesn't seem popular. I hope I get help here.</p>