我有一个带有 LE 证书的主机，它在浏览器中运行良好，但我仍然无法使用curl, openssl, wget, POST(libwww-perl) 进行连接：
卷曲
# curl -v -3 https://example.com/
* Hostname was NOT found in DNS cache
* Trying 123.123.123.123...
* Connected to example.com (123.123.123.123) port 443 (#0)
* successfully set certificate verify locations:
* CAfile: none
CApath: /etc/ssl/certs
* SSLv3, TLS handshake, Client hello (1):
* Unknown SSL protocol error in connection to example.com:443
* Closing connection 0
openssl
# openssl s_client -connect example.com:443
CONNECTED(00000003)
write:errno=104
---
no peer certificate …