Cloudflare's ECH principle is...
It says in the document that browsers do not need to set an extra browser setting.Browsers will automatically request the domain "cloudflare-ech.com" sni to the server when they access websites.
When browsing www.abc.com (IP is 6.6.6.6), the browser does not send and request abc's sni by default, right?
Can this function be done when accessing www.abc.com? The browser sends sni as xxx.com?
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