Benefits and limitations of the NAT46 mode
Key benefits
NAT46 mode offers a clear advantage in dual-stack application deployments, especially when back-end infrastructure supports only IPv6 but clients may be connecting over either IPv4 or IPv6.
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Seamless IPv4-to-IPv6 Translation: It enables clients using IPv4 to access services hosted on IPv6-only servers, without requiring any changes on the client side.
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Simplified Back-end Configuration: The back-end servers do not need to support or be aware of IPv4. FortiADC handles all the address translation transparently.
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No DNS Modifications Required: Clients continue to resolve the domain to an IPv4 VIP. The translation is handled entirely on FortiADC, avoiding DNS-level dual-stack complexity.