HDHomeRun DVR from SiliconDust uses port 5004 UDP. HDHomeRun can be administered over the Ethernet link to tune channels, broadcast an MPEG stream, etc. The device can be viewed/controlled through a range of Linux/Windows DVR/PVR programs.
List of all HDHomeRun used ports:
Discovery Protocol - UDP ...

Yes.

There's a good review here... http://www.techadvisor.co.uk/review/set-top-boxes-on-demand-tv/silicondust-hdhomerun-connect-review-3620932/

I found this note for NextPVR on their support pages

No Channels Found in Scan Back to top

Check your firewall configuration and make sure that the ...

https://www.silicondust.com/product/hdhomerun-connect/

Thanks for taking a look

Hi,

I am using HDHomerun Tuners with BDA drivers.

ProgDVB can see the tuners but when it scans finds no channels.

Can you advise?

allan