openssl x509 -in aps_development.cer -inform der -out KirmesPush.pem
openssl pkcs12 -nocerts -out KirmesPushKey.pem -in KirmesPush.p12
cat KirmesPush.pem KirmesPushKey.pem > ck.pem

telnet gateway.sandbox.push.apple.com 2195

Passwort: django
Webseite: http://www.raywenderlich.com/3443/apple-push-notification-services-tutorial-part-12