On 27/Aug/20 07:58, Bjørn Mork wrote: > Because NAT64 implies DNS64, which avoids NATing any dual stack service. > This makes a major difference today. NAT64/DNS64 was the original solution. 464XLAT is the improved approach. See: https://tools.ietf.org/id/draft-ietf-v6ops-nat64-deployment-04.html Mark.