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Problem-solving by Apple Certified Professionals

Use telnet to see if APNS ports are open

telnet 1-courier.push.apple.com 5223

 

telnet gateway.sandbox.push.apple.com 2195

 

telnet gateway.push.apple.com 2195

 

telnet feedback.push.apple.com 2196

 

telnet feedback.sandbox.push.apple.com 2196

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