Please support download setup-x86_64.exe on IPv6-only network

[Adam Dinwoodie]

On Thu, Nov 16, 2023 at 08:13:30AM +0100, Martin Wege via Cygwin wrote:
> On Thu, Nov 16, 2023 at 2:40 AM Bin W via Cygwin <cygwin@cygwin.com> wrote:
> >
> > https://www.cygwin.com/setup-x86_64.exe
> > IPv6-only network can't download the installer.
> 
> Details please. Does
> https://www.cygwin.com/setup-x86_64.exe
> not work on an IPv6-only network?
> 
> Or can setup-x86_64.exe not download data on an IPv6 network?

I've just checked: cygwin.com and www.cygwin.com only have DNS A
records, no AAAA records, so there's no way to get the installer (or
indeed anything else) from cygwin.com if you're on an IPv6-only network.

Fixing this will require setting up the web servers for cygwin.com to be
accessible over IPv6, and configuring the corresponding IPv6 addresses
in the domain's DNS records.