Connection problem to Cambridge 851N endpoint

[BlackJack]

After searching in the forum I was able to dig up the thread that I used as a guideline back in the days:

Android Roon Remote looses connection to Core (daily)

Hello @Noris, I found the problem, and the solution. tl;dr at the bottom of this post. After looking at all that has been discussed here, and looking for commonalities in the test setups, I find the following points: Roon core running natively on Linux (CentOS 7.6) looses connectivity to / is not reachable from Android Roon remotes / endpoints connected via Wifi, after some number of hours (far less than a day) of successful functioning. A restart of the Roon core (not the entire L…