nginx 配置 https ，外网无法访问

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centOS 7.4 nginx/1.12.2 https://www.lanten.me

用 acme.sh 生成的 Let ’ s Encrypt 免费证书

配置完了之后发现外网访问不了，试了电信和长城，https 都访问不了，但是手机蜂窝网络，移动和联通都可以正常访问 https

nginx 配置如下


    server {
        listen       80;
        server_name  www.lanten.me;
        return 301 https://$http_host$request_uri;
    }

    server {
        listen 443 ssl;
        server_name www.lanten.me;

        ssl on;
        ssl_certificate /etc/nginx/ssl/www.lanten.me.cer;
        ssl_certificate_key /etc/nginx/ssl/www.lanten.me.key;
        ssl_dhparam /etc/nginx/ssl/dhparam.pem;
        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_session_timeout 5m;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:AES256+EECDH:AES256+EDH;
        ssl_prefer_server_ciphers on;

        root /home/www/;

        error_page 404 /index.html;
        error_page 500 502 503 504 /index.html;

    }

已确认开放 443 端口