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DNS64 and NAT64 for Connecting IPv6-only Workloads

🌐 Google Cloud introduces DNS64 and NAT64 for Cross‑Cloud Network to allow IPv6-only workloads to access IPv4-only services without dual‑stack. DNS64 synthesizes AAAA responses by embedding IPv4 addresses into the 64:ff9b::/96 prefix, and NAT64 translates traffic by extracting those addresses and initiating IPv4 connections on behalf of IPv6 clients. The blog post includes step‑by‑step gcloud commands to create VPCs, DNS64 policies, and a NAT64 gateway.