Allowing inbound IPv6 traffic to a host and port when the IPv6 prefix is dynamic?
With IPv4, you used to be able to give a host a static local IP address on the LAN, and use a firewall rule on the firewall/router to forward a port on the (possibly dynamic) Internet-facing IP used by the network to a port on tat particular host, using the host's static LAN IPv4 address as a stable way to identify the host in the firewall rule. But with IPv