[CamperBob2]

I run under NAT, like most Internet users in the US, although my gateway has a static IP.

No clue why the LAN drops connections without keepalive traffic. I need to get up to speed on using WireShark to diagnose dropped connections one of these days, as I actually have a couple of dropped-connection issues that need troubleshooting.

Typically I'll get a connection timeout every few days, even with keepalives, and even with a hardwired DHCP address for the MAC in question. Connections with no traffic tend to get 'cleaned up' by somebody after a few hours at most.