[AusNOG] cPanel IPv6 = Overhauled

[Luke Thompson]

This gives you the option to keep DNS simple via SNI, or issue a /128 
per-website.

Either way, you only need a single prefix now per-server, and can issue 
from that.

Our preference is a /128 per-website for many reasons, like FCrDNS 
per-domain.

However there's no longer a technical reason to not permit IPv6 SNI 
inside cPanel.

Frankly, any movement towards greater adoption is a good thing - this 
helps. :-)

If clustered and configured properly, dishing out /128 addresses is 
quick & easy.

Cheers,
Luke



On 22/5/2025 1:01 pm, Mark Smith wrote:
>
>
> On Thu, 22 May 2025, 10:46 Luke Thompson, <luke.t at tnc.works> wrote:
>
>     G'day,
>
>     After meetings, back-and-forth and testing spanning over half a year,
>     we're glad to report that true IPv6 support has arrived in cPanel+WHM!
>
>     https://blog.apnic.net/2025/05/21/cpanels-ipv6-overhaul/
>
>     There's no longer the need for there to be a "server prefix" and a
>     separate "range prefix", they can now be nested, enabling true SNI.
>
>     Further, when enabling for sites, you can either use SNI via the
>     server's shared v6 addy, or issue a /128 from said prefix.
>
>
>
> An observation.
>
> SNI is a solution to be able to hosting multiple different websites on 
> the same IPv4 address.
>
> This was needed because there weren't enough IPv4 addresses available 
> anymore to give each individual website its own IPv4 address.
>
> What's the main problem IPv6 solves? ...
>
>
>
>
>
>     Ultimately this allows for far cleaner dual-stack deployments for the
>     Hosting world, with no messy workarounds!
>
>     This is now available on all release tiers, as v126 has been
>     promoted to
>     LTS you can get going with v6 now.
>
>     Many thanks to APNIC, WebPros and Global Secure Layer for your
>     assistance throughout these works.
>
>     Cheers,
>
>     Luke Thompson, CTO
>     The Network Crew P/L
>
>     E: luke.t at tnc.works
>     https://tnc.works
>
>
>     _______________________________________________
>     AusNOG mailing list
>     AusNOG at lists.ausnog.net
>     https://lists.ausnog.net/mailman/listinfo/ausnog
>
>
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> https://lists.ausnog.net/mailman/listinfo/ausnog
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.ausnog.net/pipermail/ausnog/attachments/20250522/bab4ceb6/attachment.htm>