@neil the router doesn't support IPv6.

@neil

If my ISP offered IPv6 it would be amazing.

A surprising number of UK ISP's don't offer it by default or at all.

@neil other than "can't be arsed", sometimes systemd-networkd or something will randomly mess something up and the ipv6 endpoint will stop working and I won't notice because I still don't have ipv6 at home myself in the god damn year 2026.

@neil I think I may have one or two small things on v4-only platforms - because a lot of providers can't be bothered with v6, or treat it as a second class service.

It's ridiculous, and I try to avoid such providers, but some things get stuck on seriously restricted budgets, so...

@neil I only have IPv6 on my mobile data ISP, not on my fibre connection so it feels like pointless effort for a thing I can't even meaningfully test.

@neil It has never become the top priority on the never ending list of "things I really should do".

@neil A vm for an org I'm involved with is ipv4 only, the provider doesn't support ipv6. They also don't charge us so....

@neil Vogon Media still don't support IPv6.

@neil not really an answer to the question because it's not publically available, but the wireguard tunnel endpoints on my shell host are v4-only. Since their entire purpose is to provide me with tunneled ipv6 when I'm using legacy mobile broadband, no point in exposing them to v6

@neil Components of the stack don't support it (load balancers, 365 etc)

@neil

Yes I have services which are not available over IPV6, my servers have IPv6 enabled but I didn't do the DNS setup.

Why Not?

Good question, I don't know, it is now on my TODO list.

@neil laziness

@neil
I run all my stuff dual stack, but full rDNS delegation for IPv6 is not at all common, certainly for domestic ISPs.

@neil I genuinely have no idea how to, and I learned IPv4 stuff pre-slopification of search. There were tons of small blogs & guides I picked up IPv4 from. I'm not sure where to learn IPv6.

@neil The hosting I use doesn't support it and it's not a priority

I live in the USA.

@simonzerafa @neil Canada, too.

@neil I’m running IPv5 as an interim upgrade

@neil I keep making this argument at work... Nobody seems to care...

@neil it is rare for travel esims to support it. Locally bought (e)sims do, but logistically it is much easier to deal with one global supplier than one per country.

@neil we kinda do. The e-sim is in a camera that is in a race car. The race cars travel the world from track to track. The easiest way to get connectivity is to keep feeding them travel esims :-). I sometimes wonder how I ended up here! Other sports probably do similar things.

@neil hah, got one for you: a) laziness, but that's not the fun bit; b) resolving DNS v6 across two India ISPs was slower by almost 500ms, so I moved that DNS server to v4-only

i didn't expect that one

@neil They are all on ipv6 now!

The reasons why not confused me as I tried to figure it out, but turned out to just be no DNS entries. All I had to do was add the DNS entries.

The reason I couldn't figure that out and it confused me for a little while is my VPN doesn't do ipv6 so no ipv6 works from here. Doh. No wonder my tests didn't.

Thanks for the prompt to check and fix.

@neil I send mail over IPv4 only because I can't get rDNS set for IPv6 (Kimsufi gives you a /64 but only allows you to set rDNS for the /128). I can receive mail over IPv6 though.

@neil I _think_ my services work on IPv6, but because my home network does not (purely my own fault – would require a firewall configuration that's been on my to-do list for years), I lack the ability to confirm...

@MrDOS @neil Same here, but it's not my fault - I'm double-NATed and have an ISP which refuses to handle IPv6 traffic entirely!