我正在使用Let's Encrypt证书，即使当我使用浏览器访问服务器时，浏览器报告页面也是“安全的”，但是当我使用curl时候，我正在跟随。
# curl https://XXX curl: (60) SSL certificate problem: unable to get local issuer certificate More details here: http://curl.haxx.se/docs/sslcerts.html curl performs SSL certificate verification by default, using a "bundle" of Certificate Authority (CA) public keys (CA certs). If the default bundle file isn't adequate, you can specify an alternate file using the --cacert option. If this HTTPS server uses a certificate signed by a CA represented in the bundle, the certificate verification probably failed due to a problem with the certificate (it might be expired, or the name might not match the domain name in the URL). If you'd like to turn off curl's verification of the certificate, use the -k (or --insecure) option. #
我的系统：
# cat /etc/debian_version 8.7 # cat /etc/os-release PRETTY_NAME="Debian GNU/Linux 8 (jessie)" NAME="Debian GNU/Linux" VERSION_ID="8" VERSION="8 (jessie)" ID=debian HOME_URL="http://www.debian.org/" SUPPORT_URL="http://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" #
我只使用privkey.pem ＆ cert.pem作为我的fqdn.pem，现在也使用菊花链fullchain.pem 。
固定：
# cat privkey.pem cert.pem fullchain.pem > ~/fqdn.pem #
curl ：
# curl -I https://XXX HTTP/1.1 401 Unauthorized Server: nginx/1.11.12 Date: Mon, 03 Apr 2017 16:56:33 GMT Content-Type: text/html Content-Length: 196 Connection: keep-alive WWW-Authenticate: Basic realm="" #