nginx https 443端口如何配置

   server {      listen  443 ssl;    server_name xxx.com;        ssl_certificate cert/下载的pem后缀文件;        ssl_certificate_key cert/下载的key后缀文件;        ssl_session_timeout 120m;        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;        ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;        ssl_prefer_server_ciphers on;         location / {         proxy_pass http://转发的路径（跟http一致）/;         #proxy_set_header X-Real-IP $remote_addr;         #proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;         #proxy_set_header Host $http_host;         #proxy_set_header X-NginX-Proxy true;              #由于nginx的反向代理，所以需要在这里将$remote_addr赋值给某一参数，系统通过该参数获取用户的访问ip,这里直接定义为：WL-Proxy-Client-IP     proxy_set_header            WL-Proxy-Client-IP $remote_addr;         proxy_redirect default;        }         error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }   }