环境都配置好, localhost 访问 web 服务提示 503 ,查看各种错误日志只有在 error.log 中看到了下面这一行: [Thu Dec 15 12:49:31.620859 2016] [ssl:warn] [pid 3128:tid 436] AH01897: Init: Oops, you want to request client authentication, but no CAs are known for verification!? [Hint: SSLCACertificate*]