Any thing else need to do to enable HTTP/3 support?

I enabled http / 3 support for the website in cloudflare, but it didn’t work.
My browser still use TLS 1.3 to connect to the site, while the response headers contains the alt-svc value:
alt-svc: h3=":443"; ma=86400, h3-29=":443"; ma=86400, h3-28=":443"; ma=86400, h3-27=":443"; ma=86400.
The http3-check service also reported that cannot establish the http/3 connection.
Could you please tell me what should I do to make it works? The URL of my blog site is .
I can give more information if needed.

Your domain is not on Cloudflare in the first place.

nslookup -type=ns
Server:  UnKnown
Address:    nameserver =    nameserver =

I added the domain to Cloudflare by A and AAAA records through a partner service.

Then I am afraid you’ll have to contact that partner, also because your domain is not properly configured for such a case either. It points to Cloudflare’s public resolvers.

Anyhow, to address your question, no, HTTP 3 support comes out of the box and as long as it is enabled your site will be served to any compatible HTTP 3 client.

Okay, I 'll do it later.
Thank you all the same!

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