6to4 在 2015 年就 deprecated 了...

找資料才發現 RFC 7526 廢掉 6to4 了:「Deprecating the Anycast Prefix for 6to4 Relay Routers」。


While this makes the forward path more controlled, it does not guarantee a functional reverse path.


不過目前看起來 HE 的 還有在運作,真的用 6to4 連 IPv6 network 的人至少還有機會動,等之後 IPv6 更普及應該會慢慢退場...

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