this post was submitted on 29 Jan 2025
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Genuine question:
What does ipv6 give you that ipv4 does not? I genuinely can't tell the difference as an Internet browser. Particularly on the phone.
I self host. Cgnat means my servers ipv4 is not globally accessible hence I'm using ipv6. ipv6 does also reduce network congestion and improve routing efficiency.
All the noise that happened recently with the 3G shutdown tells us just how many old phones there out there on the cell networks. Running old iOS/Android versions with a gazillion exploits. I think it's a good thing that telcos NAT their customers. The last thing we want is for the Internet to be able to easily connect to those devices.
Unless you are moving gigabits of data, you won't notice the difference the smaller header payload of ipv6 offers. That's some serious ePenis bragging bullshit I see all the time among nerds who want to say they're on the latest and fastest technology without understanding that while they are correct (uploading/downloading a gigabyte over ipv6 will probably complete a few seconds faster over ipv6 instead of ipv4), they're also making a big deal about nothing.
Your issue is you want to be able to access your home network over mobile infrastructure, while you are paying for a basic phone plan. Optus does offer what you want, but to business customers. Telstra will also permit you to apply a static IP to some of their plans, I managed to do this for a client about 10 years ago. It was just an add-on that Telstra offered. They were on a business plan, but I don't remember whether a business plan was a requirement.
IPv6 headers are usually bigger anyway^1^, so the only advantage is more efficient routing (so infinitesimally better latency), but in my experience most routers only support IPv4 hw offload and not IPv6, so it's only more efficient in theory.
I just like IPv6 because I get a whole /56 prefix to play with, and devices often randomise their host portion through the privacy extensions, meaning they use a new address each day or so.
^1^ IPv4 is usually ~20 bytes, but it can be up to 60 bytes if you stack a lot of options, IPv6 is only 40 bytes AFAIK.