Basically, the Internet ran out of IPv4 addresses to distribute about ten years ago. People knew that would happen back in the 1990ies, so they invented IPv6 with the idea that the Internet would eventually switch over to an address format that had enough addresses for basically forever. Ever since about twenty years ago, network technicians have introduced an increasing amount of hacks and shitty workarounds that would undermine and erode a lot of the egalitarian ideas and principles that originally underpinned the lowest levels of the Internet stack in order to work around this increasing shortage.
Just try hosting a computer game on a modern internet connection. On many (not all) modern internet connections, that doesn't work anymore, because you are effectively behind double NAT, and the second layer is controlled by your ISP. There is a reason why many modern multiplayer games say "fuck it, we'll host it for you". Or even "fuck it, we'll tell the user to rent a server in a datacenter if they want to host." (Note, games are just an example. There are plenty of examples where earlier internet users had some degree of autonomy when interacting with one another where current users can only hope for the continued benevolence and cooperation of Google and the like.)
By today, even though you don't really see it as an end-user, the IPv4 internet is basically held together with spit and duck tape. And also an honest-to-goodness black market for IPv4 addresses.
However, the big and obviously advantageous switch still isn't happening. There are hardly any services out there that will work via IPv6, but not IPv4, so there is no visible incentive for end users to even want IPv6. In fact, most won't even know what that is. (Technically, there is one: A Japanese site from like 1999 that will show you an animated gif of a turtle instead of a static one if you visit via IPv6. Somehow that hasn't yet convinced grandma from down the road to switch to an ISP that promises high quality IPv6 connection...) On the flip side, anybody offering a service on the Internet knows that it absolutely must be reachable via IPv4, even if that's expensive and cumbersome, while IPv6 is kinda optional, even if those addresses are a dime a dozen... million.
The whole thing is a bit of a catch-22 at this point, and even though all the experts know, and have known for 30 years, that we must switch over eventually, no real progress seems to be made lately.
Lemmy.world getting or not getting an IPv6 address is not going to make or break this. Still, it is irksome to see it being one of those obstacles that keep standing in the way of progress.
The more servers have IPv6 support the more it will become the standard and we can finally switch to it instead of IPv4.
Now why you'd wanna switch, the main reason is there are far too few IPv4 addresses available for every device to actually have a unique IPv4 address, and that results in all sorts of headaches.
Slightly off topic, but perhaps you can point me in the right direction. I recently upgraded my home router/NAT firewall to one that runs pfSense and it now supports IPv6. I was slightly horrified to find that DHCP had assigned all my devices IPv6 addresses and that they were all publicly routable. Comments online seemed to indicate that in order to protect devices on my local network from being probed by external entities I'd have to create custom firewall rules. I know just enough to know I didn't want to do that as the likelihood of doing it wrong and compromising security far outweighed any benefit I'd see from IPv6. The only other option was to disable all IPv6 traffic at the firewall.
What am I missing here? Is it intended that regular home users have their printer, which the manufacturer hasn't seen fit to update since Bush Jr. was president, exposed to the entire Internet? Is it that the IPv6 space is so large that port scanning for vulnerable machines is like finding a needle in a haystack?
Hello, I am a CEO at Discord, actually, when you have too much addresses for the quantity of numbers you have, we advice taking those numbers out, that works definitely better!
Edit a few hours later: I'm happy to know people are not agreeing with what I said. Just in case, this is /s
I see that lemmy.ml is the only major instance currently reachable over IPv6
How do you define "major instance"? At lemm.ee, we have the same order of magnitude of users as some of the ones you listed, and I believe we are fully accessible over IPv6 😛
I'm sure it will before long. The server has already been moved to allow for growth, once things are more stable that will be fairly easy to add to a cloud hosted server like this.
I've started my Lemmy instance on v6 only but needed to add a v4 address at it seems to not sync properly while only using v6. Anyone else encountered the problem ?