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HTTP vs HTTPS

The web is evolving towards using secure connections everywhere. While this is generally a good thing for security, it does impact what tests we can run.

When visiting with HTTPS, we are unable to detect NAT64 or Teredo. Some browsers now force HTTPS. For these browsers, these features are no longer available.

Why do these specific tests fail when using HTTPS?

NAT64 is detected when connections by name work, but by IPv4 numeric address do not.
Teredo is detected when connections by name fail, but by IPv6 numeric address work.

When running in HTTPS mode, connecting to a specific IP address requires a special certificate. These certificates are available only with proof of ownership for the IP address.

test-ipv6.com is actually spread across many providers. Some are hosting providers, or customers of hosting providers. Some are broadband internet providers. It is not possible for test-ipv6.com to prove ownership of their address space. As an example, I can't prove I own the Comcast (a large US broadband provider) IP addresses used by this site.

Links:

• https
• http

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