https不仅仅安全，2017下半年开始各大搜索引擎会优先收录https站点，https消耗最大的是握手过程，所以要比http慢很多，很多站长不太愿意启用。下面按照我列出的方法，写入到你的配置当中，可以明显为给你的https加速，效果立竿见影！

    #HTTP_TO_HTTPS_END
    ssl_certificate    /etc/letsencrypt/live/你的域名/fullchain.pem;
    ssl_certificate_key    /etc/letsencrypt/live/你的域名/privkey.pem;
    add_header Strict-Transport-Security "max-age=31536000; includeSubdomains; preload";
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_stapling on;
    resolver 8.8.8.8 114.114.114.114 valid=3600s;
    ssl_prefer_server_ciphers on;
    ssl_stapling_verify on;
    ssl_dhparam dh2048.pem;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
    error_page 497  https://$host$request_uri;

dh2048.pem默认是会报错的，因为需要自己手动生成，可以打开面板或者登陆ssh进行生成dh2048.pem文件

cd /www/ && openssl gendh -out dh2048.pem 2048 && cp -i /www/dh2048.pem /www/server/nginx/conf/

然后在面板上将当前路径下的dh2048.pem复制放置/www/server/nginx/conf/下

然后到软件管理点击nginx的设置中重启一下nginx即可,可以提升证书的安全保密性的同时减少重复请求的耗时!