despite the smoothbrain naysayers:

https://circleid.com/posts/20190529_digging_into_ipv6_traffi...

finally, the end of the dark tunnel of NAT is in sight, and the internet will be free once more

There is nothing about IPv6 that prevents ISPs from filtering ports for all customers. They almost all actively filter at least port 25, 139 and 445 regardless of the actual transport. So I'm not sure "blocking service hosting" is the actual goal here.

The problem seems to be that all of the large and wealthy nations of the world have made the necessary huge investments into IPv6 while many of their smaller neighbors and outlying countries and islands have struggled to get any appreciable deployment.

It should be a UN and IMF priority to get IPv6 networks deployed in the rest of the world so we can finally start thinking about a global cutover.

Which is what ISP are doing with 464XLAT deployments. IPv6-mostly networking and IPv4-as-a-service are things that are happening in real world right now.

Yeah, I dont get why more ISPs don't offer carrier-grade NAT64 instead of the typical CGNAT

IMO with the right market conditions, IPv6 could spread really fast within 6-24 months. For example, most cloud providers are now charging for IPv4 addresses when IPv6 is free. Small changes like that push in the right direction.

^1 https://www.theregister.com/2025/08/04/asia_in_brief/

The only arguments I've ever heard against ipv6 that made any sense are that:

1: it's hard to remember addresses, which is mayyyyybe valid for homelab enthusiast types, but for medium scale and up you ought to have a service that hands out per-machine hostnames, so the v6 address becomes merely an implementation detail that you can more or less ignore unless you're grepping logs. I have this on my home network with a whopping 15 devices, and it's easy.

and 2: with v6 you can't rely on NAT as an ersatz firewall because suddenly your printer that used to be fat dumb and happy listening on 192.168.1.42 is now accidentally globally-routable and North Korean haxors are printing black and white Kim Il Sung propaganda in your home office and using up all your toner. And while this example was clearly in jest there's a nugget of truth that if your IOT devices don't have globally-routable addresses they're a bit harder to attack, even though NAT isn't a substitute for a proper firewall.

But both of these are really only valid for DIY homelab enthusiast types. I honestly have no idea why other people resist ipv6.

That makes sense. The majority of IPv6 deployment is mobile.

The next wave of adoption requires ISPs start offering residential IPv6. Once this happens, router manufacturers will innovate around the IPv6 offering as a differentiator, making it easy to deploy by end-users. IPv6 wifi APs will then become ubiqutious and so forth across other services. Has to start with ISPs.

>it's in their best interest to ensure users can't host services without them.

They'll just keep blocking port 25. IPv6 won't change anything with regards to self hosting.

Well, the curve has got to level-out at 100%.

Was fun seeing IPv6 running for a few days without problems.

Generally: I'm really surprised that Norway is just at 27%. I think I've been with 3 different residential ISPs the last 15 years, and all of them have done IPv6 perfectly well (two nits: I think one required a trivial opt-in, and my current ISP is just giving me /60 which isn't perfect).

Edit: Oops, sorry to my current ISP for shaming them. Some googling told me that one can get a /56 using DHCPv6-PD. I'll try that!

ABC, Always Be Closing.

There might be a child behind the NAT, thus IPv6 requirement.

An excellent reason to move away from Github, I find.

Maybe we shouldn't even measure percentage adoption and instead just if github has finally adopted..

If you are single, have a phone contract, you would need some extra contract for a landline internet and wifi router because thats what a lot of people just do and now they can just add an esim and pay a little bit more.

Interesting that this sounds/feels a lot more right or useful than it did 5 years ago.

I wish hosting providers would give you a local routed ipv4 on ipv6 servers with a default NAT server. It is not that expensive I move 10Gbps "easily" and they could charge for that traffic.