[Solved] Android App not connecting outside

[Gilles990]

IP V6 was the problem.

Android applications do not switch to ipv4 when ip v6 not available.

I didn't open the route on my router in IP V6.

If my syno use IPV6 .... applications dont work, browsers ok
if my syno doesn't use IP V6, applications work. browsers ok

If ipV6 route is ok on your router everything ok.

It's always workin with browsers.