Android Roon app not connecting to Core over internet

[Stefano_Massera]

I installed the Roon Core on my Synology DS720+, then I tried to connect with the android app installed on my pixel4a over mobile data connection.

The Roon app is not connecting. It says it needs to be connected to the same Wi-Fi as the Roon Core.
Really? Can I set somewhere my hostname to connect remotely?

Thanks for your help.

[Rugby (aka Daniel or Big Dan)]

@Stefano_Massera

It says it needs to be connected to the same Wi-Fi as the Roon Core.
Really?

Yes. Absolutely. Roon requires everything to be on the same sub-net.

[Stefano_Massera]

Meaning outside my Wi-Fi I can connect only via VPN, right?

[Rugby (aka Daniel or Big Dan)]

No, Roon is not built to use any VPN and does not support VPN usage. Everything has to be on the same local network, whether Wifi or Wired, and on the same sub-net.