1. site HTTP/3 化

https://blog.cloudflare.com/how-to-test-http-3-and-quic-with-firefox-nightly/

https://blog.jxck.io/entries/2022-02-05/http3.html

サイトの HTTP3 化と DNS HTTPS RR および Alt-Svc Header によるアドバタイズ created_at 2022-02-05 updated_at 2023-11-16

1.1. whois

How do I enable HTTP/3 for my domain?

Simply go to the Cloudflare dashboard and flip the switch from the "Network" tab manually:

1.2. history

CategoryDns CategoryWatch CategoryTemplate