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Using the Internet without IPv4 connectivity

(jamesmcm.github.io)
296 points jmillikin | 1 comments | 29 Jun 25 08:23 UTC | HN request time: 0s | source
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simonjgreen ◴[29 Jun 25 09:20 UTC] No.44411529[source]▶
Slightly misleading title, this is more “getting to the IPv4 internet via an IPv6 tunnel through a VPS”. Also just called 4in6.

Interesting nonetheless!

We find at our ISP that if we break something with IPv4 we experience a very different type of support issue to if we break IPv6. Breaking v4 results in, broadly, a pretty hard “down” state. While folks are unhappy, it is at least simple. Breaking v6 results in weird, and a partial down, which manifests for the users as partial outages, slow starts due to fall back, etc. Especially if their gateways believe there is v6 when there isn’t.

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jeroenhd ◴[29 Jun 25 11:56 UTC] No.44412377[source]▶
When my IPv4 died last time, I noticed it mostly because Github didn't work anymore. These days, most consumer websites just work on IPv6. That said, people whose routers were only provisioned IPv4 DNS servers did have a full outage.

If Microsoft would get off their incompetent assets already, my biggest concern would've been remembering the mDNS hostname I've assigned to my router so I could log in and see if IPv4 is back already.

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1. mikepurvis ◴[29 Jun 25 17:38 UTC] No.44414850[source]▶
My ISP (TekSavvy) manages to semi regularly screw up ipv4 and what I notice is that "big" sites like Amazon, Google, Facebook, SO, etc all work as before, but it's the in-between sites, someone's blog on a search result, etc— that's the stuff that breaks.