The HD-FOX (as standard) has no media server capability. I don't know whether the Foxsat has media (DLNA) client capability, let's assume it does.
First the recordings made on the HD-FOX need to be decrypted. To do that you will need to install the MSP, run HDR mode, and do decrypt-copy operations for all of them. Then you can run Mediatomb to provide the HD-FOX with server capabilities it didn't have before.
If you were actually asking about serving from the Foxsat to the HD, if the Foxsat has server capabilities you need to turn them on, and then on the HD-FOX press "media", blue, and select "network" - the HD- will then seek any DLNA client on your network (including the Foxsat if it works) and list them as sources of media.