jks

Almost certainly because I've been updating the IP address blacklist and you have automatic blacklist downloads turned on.

On the admin status tab is a list of all possible reasons for a nightly restart. The last item in that list "Network tab: Automatically download IP blacklist" is probably set green in your case (this is the default). I can't remember if there's a specific log message when this occurs or not.

Okay, blacklist pushed with 7 new IP ranges.

So the problem here was a Kiwi purchased from a distributor that was old enough it didn't have the two boards (Kiwi, Beagle) held together via the two nylon standoffs. Vibration in transit was enough to separate the two header connectors such that the Kiwi board was not seen by the Beagle. The Beagle itself was working fine.

Re-seating the Beagle onto the Kiwi board was all that was necessary to get it working. But it took us a while to realize this had occurred.

Yes, because it makes no sense to try and register a Kiwi as being public when there will be no channels anyone can connect to!

If you want all your channels to have a password then presumably everyone who knows the password also knows how to get to your Kiwi.

The wording of that menu item is perhaps not 100% clear. But I couldn't think of a better way of saying it.