Comment by arthurfirst | Hacker News Reader

Comment by arthurfirst | Hacker News Reader

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Of course not.

But IPv6 is not the solution to Ipv4's issues at all.

IPv6 is something completely different justified post-facto with EMOTIONAL arguments ie. You are stealing the last IPv4 address from the children!

- Dual stack -- unnecessary and bloated - Performance = 4x worse or more - No NAT or private networks -- not in the same sense. People love to hate on NAT but I do not want my toaster on the internet with a unique hardware serial number. - Hardware tracking built into the protocol -- the mitigations offered are BS. - Addresses are a congintive block - Forces people to use DNS (central) which acts as a censorship choke point.

All we needed was an extra pre space to set WHICH address space - ie. '0' is the old internet in 0.0.0.0.10 --- backwards compatible, not dual stack, no privacy nightmare, etc

I actually wrote a code project that implements this network as an overlay -- but it's not ready to share yet. Works though.

If I were to imagine my self in the room deciding on the IPv6 requirements I expect the key one was 'track every person and every device every where all the time' because if you are just trying to expand the address space then IPv6 is way way way overkill -- it's overkill even for future proofing for the next 1000 years of all that privacy invading.

> All we needed was an extra pre space to set WHICH address space - ie. '0' is the old internet in 0.0.0.0.10 --- backwards compatible, not dual stack, no privacy nightmare, etc

That is what we have in ipv6. What you write sounds good/easy on paper, but when you look at how networks are really implemented you realize it is impossible to do that. Networks packets have to obey the laws of bits and bytes and there isn't any place to put that extra 0 in ipv4: no matter what you have to create a new ipv6. They did write a standard for how to send ipv4 addresses in ipv6, but anyone who doesn't have ipv6 themselves can't use that and so we must dual stack until everyone transitions.

Actually there is a place to put it... I didn't want to get into this but since you asked:

My prototype/thought experiment is called IPv40 a 40bit extension to IPv4.

IPv40 addresses are carried over Legacy networks using the IPv4 Options Field (Type 35)

Legacy routers ignore Option 35 and route based on the 32-bit destination (effectively forcing traffic to "Space 0". IPv40-aware routers parse Option 35 to switch Universes.

This works right now but as a software overlay not in hardware.

Just my programming/thought experiment which was pretty fun.

When solutions are pushed top down like IPv6 my spider sense tingles -- what problem is it solving? the answers are NOT 'to address address space limitations of IPv4' that is the marketing and if you challenge it you will be met with ad hominen attacks and emotional manipulations.

You didn't save anything as everyone needs to know the new extension before anyone can use it.

Hardware is important - fast routers can't do work in the CPU (and it was even worse in the mid 90's when this started), they need special hardware assistance.

All good points guys -- but my point was to see what is possible. And it was. And it was fun! Of course I know it will perform poorly and it's not hardware.

So you have to update every router to actually route the "non-legacy" addresses correctly. How is this different from IPv6?

That is the easy part - most of the core routers have supported ipv6 for decades - IIRC many are IPv6 only on the backbone. The hard part is if there is even one client that doesn't have the update you can't use the new non-legacy addresses as it can't talk to you.

Just like today, it is likely that most client will support your new address, but ISPs won't route them for you.

Yes of course I know all that. That was the whole point of the overlay first approach. i.e. Build a network that works over the existing network before adding any barriers to entry like specialized hardware requirements.

So either the new octet is in the least-significant place in an ipv40 address, in which case it does a terrible job of alleviating the IP shortage (everyone who already has IP blocks just gets 256x as much as them)

Or, it’s in the most-significant place, meaning every new ipv40 IP is in a block that will be a black hole to any old routers, or they just forward it to the (wrong) address that you get from dropping the first octet.

Not to mention it’s still not software-compatible (it doesn’t fit in 32 bits, all system calls would have to change, etc.)

That all seems significantly worse than IPv6 which already works just fine today.

> it’s in the most-significant place, meaning every new ipv40 IP is in a block that will be a black hole to any old routers, or they just forward it to the (wrong) address that you get from dropping the first octet.

Black hole for old routers. You run the software overlay until you can run the hardware.

I wrote a linux kernel module and an node/relay daemon that runs on every host.

There is a (0.)0.0.0.0 dedicated LAN space that auto-assign IPs. I called it the standard LAN party :) No more 10.0/192.168/etc Gateway always has .1 -- sensible defaults.

Also 0-255. Adds 255 IPv4 internets of address space. Billions and Billions of addresses are more than moar than enough.

Maybe one day I'll put on a fireproof suit and post it here for fun and see how much flame I get.

I almost completely agree with you, but IPv6 isn't going anywhere - it's our only real alternative. Any other new standard would take decades to implement even if a new standard is agreed on. Core routers would need to be replaced with new devices with ASICs to do hardware routing, etc. It's just far too late.

I 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.

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.

> 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.

> 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.

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?

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