Comment by ninkendo

> By giving all of your hosts dns names you don’t have to care about the individual addresses much. If they change just update the dns zone

"just" update the zone? Yikes. I prefer to not take that downtime in the first place. (And I know from experience, I've written hooks for dhcpcd that automatically reconfigure my zone file, firewall rules, rad.conf, etc, if I get a new network prefix! But I don't pretend that this is a workable approach for everyone.)

> The second is to configure a Unique Local Address for each host using SLAAC

Yes, this is the way. Where you used to use RFC1918 addresses, just use ULA. It's simple and fits the mental model you used to have with IPv4. You don't even need NAT, just give both the GUA and ULA addresses to each host, and use the ULA everywhere you want LAN-like semantics.