Connectivity/firewall

In order to send push notifications via the Google and Apple push servers, IAM must be able to connect to the push servers. Make sure that the local firewall is configured accordingly, or configure a proxy.

For iOS:

api.push.apple.com:443 must be reachable
for sandbox mode, api.development.push.apple.com:443 must be reachable

For Android:

fcm.googleapis.com must be reachable

Note that the Java code from the Vasco library must be able to resolve these hostnames.

Using a proxy

The Cronto Push Notification Sender plugin allows for the configuration of proxy settings. The Vasco library will then connect to the push servers through the proxy.