Roon perfectly running, but the NUC is not pingable

I agree with @ged_hickman1, though there is a leaning curve with ROCK to install it (the forum would of cause be on hand to support you).

However, critically your NUC needs to be compatible with ROCK …

Checkout this page … specifically the “More about ROCK’s hardware support…” section…

If your NUC (what version is it?) is not listed (it may be too new) just hang tight … at some point Roon will update RoonOS (that ROCK runs on).

There has been some discussion on a Roon OS update and new functionality but don’t expect to see a timeframe for it’s release (Roon don’t do that).