Partway through writing a response about how that couldn't be the reason, I decided it would be faster to simply set the proxies to static IP addresses to prove that it wouldn't change anything.
Huh. Look at that .
They've run over 7 hours straight with no reboots. Granted that was overnight, and the reboots seemed more frequent in the afternoon evening hours, but this is somewhat encouraging.
Stay tuned; let's see if they go a day without reboots.
What's odd about this is that I have my DHCP server set up for 7 day leases. What I understand of the lease renewal says there's no way the clients (proxy machines) are chatting with the DHCP server as often as I've been seeing the reboots...
More to learn I guess, and a chance to affirm my theory that learning new things keeps an aging brain young(er).
Thanks for the idea.
No problem. Remember some of this hardware (read ASIC network controllers) is on the cheap side so doesn't always behave as we'd expect. Was it your router, was it the cube's being silly? We probably won't ever know.