第一次发帖,很尴尬. 
最近在使用 cloudflare 的时候,如果启动 橙云（DNS Proxy) 就发现不能直接访问: 
C:\Users\xxxx>curl -v https://example.com
* Host example.com:443 was resolved.
* IPv6: 2606:4700:3030::6815:7001, 2606:4700:3030::6815:2001, 2606:4700:3030::6815:3001, 2606:4700:3030::6815:4001, 2606:4700:3030::6815:1001, 2606:4700:3030::6815:6001, 2606:4700:3030::6815:5001
* IPv4: 104.21.16.1, 104.21.80.1, 104.21.32.1, 104.21.64.1, 1...