This task builds on the task to
Configure
NAT64 for IPv4-Initiated Communication, but the organization
controlling the IPv6 network prefers to translate the public destination
port number to an internal destination port number and thereby keep
it private from users on the IPv4 untrust side of the firewall.
In this example, port 8080 is translated to port 80. To do that,
in the Original Packet of the NAT64 policy rule, create a new Service
that specifies the destination port is 8080. For the Translated
Packet, the translated port is 80.