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The IPv6 Transition

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215 points todsacerdoti | 1 comments | 20 Oct 24 05:54 UTC | HN request time: 0s | source
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uobytx2 ◴[20 Oct 24 21:14 UTC] No.41898529[source]▶
People posting have mentioned that IPv4 is working for what they use the internet for. But of course it is. When NATs has been required for your whole life, how could the internet have built features that needed p2p routing? Just convince businesses to build something that requires special router configuration? And still wouldn’t work on phones or with ISPs that require CG NAT? You got what worked out of the box. You obviously couldn’t use what didn’t exist.
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theamk ◴[20 Oct 24 22:55 UTC] No.41899158[source]▶
Why do people assume IPv6 means "easy p2p"?

Even if NAT will be gone one day, the stateful firewalls won't. Every every home router would still ship with "deny all incoming" by default, and every corporate network would have the same setting as well.

Same as IPv4, IPv6 serving would still need registration with border device, either manual by user, or via UPnP-equivalent.

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1. ndriscoll ◴[20 Oct 24 23:47 UTC] No.41899487[source]▶
UDP hole punching works when you don't have symmetric NAT. So e.g. voice and video calls don't need a proxy and can be higher quality. You only need a third party to locate/signal your peer.