IPv6 观点
我正在研究p2p应用程序，所有这些NAT-PMP和UPNP NAT穿越场景都很难处理。您对 IPv6 何时普及有什么想法吗？
I'm working on p2p application, all these NAT-PMP and UPNP NAT traversal scenarios are so unpleasant to deal with. Any thoughts on when IPv6 will become commonly used?
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如果您想要放弃 IPv4 支持，还需要很长时间。另外，不要确信 IPv6 中不会有 NAT。许多人希望像使用 IPv4 一样使用 IPv6，这意味着隔离内部网络，并通过 NAT 连接到公共端。起初看起来不会有任何 IPv6 NAT 的实现，但现在我相信有，所以你甚至不能指望 NAT 会消失（不过，它应该是 1 对 1 NAT ，这比 n 对 1 端口过载更容易处理）。即使没有 NAT，人们仍然需要状态防火墙，因此您仍然必须在 P2P 的防火墙上挖漏洞。
It will be a LONG time before you can drop IPv4 support, if that's what you're getting at. Also, don't be so sure there won't be NAT in IPv6 too. A lot of people want to use IPv6 the same way they use IPv4, and that means isolated internal networks with NAT to the public side. At first it was looking like there weren't going to be any implementations of IPv6 NAT, but now I believe there are, so you can't even count on the disappearance of NAT (still, it should be 1-to-1 NAT, which is a little easier to deal with than n-to-1 port overloading). Even without NAT people still want stateful firewalls, so you still have to poke holes in those for P2P.