Custom domains on GitHub Pages gain support for HTTPS

I use Cloudflare to get HTTPS on my github pages site, and I really like it. I get a lot of control over cached content and security, and statistics about site traffic. I am kind of happy that GitHub did not support HTTPS for custom domains, because then I would not have learned how to use Cloudflare.

HTTPS does work for my site now, but I get this warning:<p>Your connection is not secure &#x2F; Your connection is not private<p>Error code: SSL_ERROR_BAD_CERT_DOMAIN (Firefox)<p>NET::ERR_CERT_COMMON_NAME_INVALID (Chrome)<p>Trying adding the A records as described here:<p><a href="https:&#x2F;&#x2F;help.github.com&#x2F;articles&#x2F;setting-up-an-apex-domain&#x2F;" rel="nofollow">https:&#x2F;&#x2F;help.github.com&#x2F;articles&#x2F;setting-up-an-apex-domain&#x2F;</a><p>Will update if that works..

My site says &quot;Unavailable for your site because your domain is not properly configured to support HTTPS&quot;, but I don&#x27;t see instructions to resolve it?

This is great! Now, if only GitHub would be available via IPv6, that would remove the need for CloudFlare — not that I would necessarily remove CloudFlare, but I would feel better if my setup wasn’t dependent on it.

Hm, I get SSL_ERROR_NO_CYPHER_OVERLAP in Firefox on <a href="https:&#x2F;&#x2F;stack.blogs.losttech.software&#x2F;" rel="nofollow">https:&#x2F;&#x2F;stack.blogs.losttech.software&#x2F;</a> , that is served from <a href="https:&#x2F;&#x2F;github.com&#x2F;losttech&#x2F;stack-blog" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;losttech&#x2F;stack-blog</a> via Cloudflare.

I&#x27;ve been doing HTTPS on hosted domains for years, and I don&#x27;t really get how it works in this case. Is it that you don&#x27;t use your own certificate, but GitHub automatically generates one with Let&#x27;s Encrypt for you? If not, then how exactly do you give GitHub your cert? The instructions seem vague on this.

Such a shame they quietly broke IPv6 support.

Could this be related to Google&#x27;s recent announcement of the .app TLD with mandatory HTTPS[0]?<p>[0]: <a href="https:&#x2F;&#x2F;www.blog.google&#x2F;topics&#x2F;developers&#x2F;introducing-app-more-secure-home-apps-web&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.blog.google&#x2F;topics&#x2F;developers&#x2F;introducing-app-mo...</a>

Can you host multiple HTTPS sites at different domains from one GitHub account?

Too little, too late.<p>I moved my repo to GitLab pages after Google announced it would prioritise sites that support HTTPS in its search results.