Hello everyone,
I'm stuck with a strange android behavior and I'd appreciate if anyone can suggest me how to proceed.
Iv developed an App with gcm first, now upgraded to fcm, to just send messages and notifications from a server. Everything goes well using this app with mobile connectivity or with wifi on an open network, but the devices stop to receive notifications when they are connected to a wifi behind a proxy. The proxy is of course configured on the device and they can surf on internet, read email, connect to the machine with the gcm server installed; they just dont receive notification
and not only for my app but for all apps, like hangouts, whatsapp and gmail
Probably google play service cannot connect with google server
but what can I do to force it?
I can manage all the network setting, I removed the firewall, all ports are open. If I connect to the normal gateway everything works, if I connect devices to this transparent proxy, notifications stop to arrive.
Iv read on forums that most users use Drony or they root the smartphones, unfortunately these devices are in a production environment and under warranty, I cannot install third-party app or root the devices.
In my app I dont manage directly proxy configuration, this is a OS configuration, but is it normal that android notifications dont work behind a proxy?