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The original was posted on /r/ipv6 by /u/joelpo on 2023-06-29 17:02:05+00:00.

From Microsoft Edge browser, on both Win11 and Android, the resources link “Do you have IPv6?” (or “IPv6 test#2” on new reddit), http://test-ipv6.com, reports “No IPv6 address detected”. It works fine on Brave browser on the same clients.

For other sites, Edge is clearly using my IPv6 client address. https://ipv6-test.com and https://ipv6.google.com work fine, for example. And I can confirm in logs on my external site that I’m hitting my site with the client’s temp IPv6 address.

I don’t think it’s DNS since everything seems to be resolving correctly via 2606:4700:4700::1111. I don’t use secure DNS.

EDIT: Okay, and of course I found that it works using https://test-ipv6.com (TLS) just after posting this. Not that I want to spend my afternoon debugging test-ipv6.com, but there are some images that are getting a 404 using just http, but resolve using https. So not an IPv6 issue, sorry. But: Maybe change your link to use https?