How do I enter a "supported application" on a BT Hub 3

[licquorice]

I fear you are misunderstanding the purpose and usage of port forwarding.

Port forwarding is not required within your network.

Port forwarding is to allow external devices/apps/ games etc to access a device on your internal network. 

All your devices connected to your network are within the firewall.

[licquorice]

If you are backing up your devices to an external device/cloud, that is an outbound connection and doesn't require port forwarding which is only required for inbound unsolicited connections.

[Laurieo]

Hi,

Yes I'm sure that I don't fully understand about port forwarding, but when a backup is initiated by my software, the first thing it does is get a load of meta-data (from the backup server) about all the files in my backup sets so it can decide which files have changed and needs backing up.

So, the initial operating is an incoming connection, and that's what's being blocked.

[licquorice]

No, it isn't. The initial connection is outbound from your backup software to which the backup server responds. It is not an unsolicited connection from the server.

Not sure what the problem is, but port forwarding is not the answer.

[Laurieo]

You are right, that I don't really understand about port forwarding.  However, I forwarded those two ports to my desktop  computer and the backup software started working.

Anyway, I'm in discussions with the support peops at the backup software company (iDrive) and may need to talk to the BT people.

Thanks for your comments