Comment by arthurfirst | Hacker News Reader

Comment by arthurfirst | Hacker News Reader

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> still shake my head at IPV6's committee driven development, though. My god, the original RFCs had IPSEC support as mandatory and the auto-configuration had no support for added fields (DNS servers, etc). It's like the committee was only made up of network engineers. The whole SLAAC vs DHCP6 drama was painful to see play out.

So true.

> That being said, most modern IPv6 implementations no longer derive the link-local portion from the hardware MAC addresses (and even then, many modern devices such as phones randomize their hardware addresses for wifi/bluetooth to prevent tracking). So the privacy portions aren't as much of a concern anymore. Javascript fingerprinting is far more of an issue there

JS Fingerprinting is a huge issue.

Honestly if IPv6 was just for the internet of things I'd ignore it. Since it's pushed on to every machine and you are essentially forced to use it -- with no direct benefit to the end user -- I have a big problem with it.

So it's not strictly needed for YOU, but it solves some problems that are not a problem for YOU, and also happens to address space. I do not think the 'fixes' to IPv6 do enough to address my privacy concerns, particularly with a well-resourced adversary. Seems like they just raised the bar a little. Why even bother? Tell me why I must use it without resorting to 'you will be unable to access IPv6 hosted services!' or 'think of the children!?' -- both emotional manipulations.

Browser / JS fingerprinting applies to IPv4, too. And your entire IPv4 home network is likely NAT'd out of an ISP DHCP provided address that rarely changes, so it would be easy to track your household across sites. Do you feel this is a privacy concern, and why not?

> Tell me why I must use it without resorting to 'you will be unable to access IPv6 hosted services!' or 'think of the children!?' -- both emotional manipulations.

You probably don't see it directly, but IPv4 IP addresses are getting expensive - AWS recently started to charge for their use. Cloud providers are sucking them up. If you're in the developed world, you may not see it, but many ISPs, especially in Asia and Africa, are relying on multiple levels of NAT to serve customers - you often literally can't connect to home if you need or want to. It also breaks some protocols in ways you can't get around depending on how said ISPs deal with NAT (eg you pretty much can't use IPSEC VPNs and some other protocols when you're getting NAT'd 2+ times; BitTorrent had issues in this environment, too). Because ISPs doing NAT requires state-tracking, this can cause performance issues in some cases. Some ISPs also use this as an excuse to force you to use their DNS infra that they can then sell onwards (though this can now be mitigated by DNS over HTTPS).

There are some benefits here, though. CGNAT means my phone isn't exposed directly to the big bad internet and I won't be bankrupted by a DDOS attack, but there are other, better ways to deal with that.

Again, I do get where you're coming from. But we do need to move on from IPv4; IPv6 is the only real alternative, warts and all.

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