Everything networking - What is function of NAT66

IPv6-to-IPv6 Network Address Translation (NAT66): It replaces the IPv6 address prefix in the packet header with another IPv6address prefix to implement IPv6 address translation.
NAT66 is mainly used on the edge devices connecting two IPv6 networks. It allows Intranet users to access the external public network and allows the external public network to access some internal network resources (such as internal servers)

Enable NAT66 not only protects the privacy of IPv6users on private networks, but also reduces the cost of maintaining and managing IPv6 networks.
If the current device cannot access the Internet through DHCP or cannot obtain the IPv6 prefix, you need to enable the NAT66function to allocate IPv6 addresses to clients on the internal network.