Real World NAT64 deployments

Owen DeLong owen at
Thu Mar 3 23:41:05 CST 2011

On Mar 3, 2011, at 1:54 PM, William Herrin wrote:

> On Thu, Mar 3, 2011 at 3:41 PM, Hammer <bhmccie at> wrote:
>> I need a cheat sheet.
>> nat64
>> 6to4nat
>> 6in4nat
>> etc...
> 6to4 and 6in4 are not NAT. They're tunnels (VPNs) that allow two IPv6
> nodes to talk to each other via an IPv4 backbone.
> nat64 is NAT. It allows IPv6 endpoints to communicate with IPv4 endpoints.
> nat44 is the IPv4 NAT you're used to.
> nat444 is carrier NAT (translated once by the customer and once again
> by the ISP, get it?)
More accurately:

NAT44 is consumer NAT you're used to.
LSN/CGN is NAT at the carrier level.
DS-LITE is native IPv6 with private IPv4 tunneled over IPv6 to reach
	an LSN/CGN for IPv4 connectivity.
NAT444 is NAT44 + LSN/CGN


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