NAT and IPv6 6to4 tunnel

Why NAT does not work with 6to4 tunnel and works with Teredo and 6in4? Thanks
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leblancAccountingAsked:
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Matt VCommented:
Well, I would forget about 6to4, it has been moved to historical status and will likely be unsupported shortly.

http://tools.ietf.org/html/draft-ietf-v6ops-6to4-to-historic-04
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Matt VCommented:
NAT-PT has been deprecated.  It is no longer supported.

What are you trying to accomplish?
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leblancAccountingAuthor Commented:
Isn't 6to4 a tunnel technology and NAT-PT an IPv6 translation technology?

I am just trying to understand why NAT works with Teredo tunnel and 6in4 of tunnel broker and not with 6to4.
I am doing research on IPv6 transition technologies for the IPv6 planning process of our organization. Thanks.
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nociSoftware EngineerCommented:
6to4 never realy flew, it attempt to translate IPv6 into IPv4 and vice versa with all peculiarities that it should bridge between TCP6 & TCP4 which are not quite the same.

6in4 is IPv6 inside a IPv4 transmission channel.
Teredo is microsoft's view on 6in4.
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