使用 certbot 为域名生成 https 证书(ubuntu14.04)

生成证书

1.获取 certbot 

wget https://dl.eff.org/certbot-auto
chmod a+x certbot-auto

2.更新 certbot 

./certbot-auto

3.生成证书 

./certbot-auto certonly --standalone -d example.com -d www.example.com

Diffie-Hellman Group

sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 2048

配置 nginx

snippet 1 

listen 443 ssl;

server_name example.com www.example.com;

ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;

snippet 2 

ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_dhparam /etc/ssl/certs/dhparam.pem;
ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:50m;
ssl_stapling on;
ssl_stapling_verify on;
add_header Strict-Transport-Security max-age=15768000;

snippet 3 

server {
    listen 80;
    server_name example.com www.example.com;
    return 301 https://$host$request_uri;
}

Auto Renew

sudo crontab -e

添加以下内容 

10 1 * * 1 /usr/local/sbin/certbot-auto renew >> /var/log/le-renew.log
20 1 * * 1 /etc/init.d/nginx reload

Ref

  • certbot 获取
  • nginx https 配置
  • crontab 文件格式：分 时 日 月 星期 要运行的命令
    • 第1列分钟0～59
    • 第2列小时0～23（0表示子夜）
    • 第3列日1～31
    • 第4列月1～12
    • 第5列星期0～7（0和7表示星期天）
    • 第6列要运行的命令