Kích hoạt HTTPS cho blog cá nhân

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$ sudo certbot --nginx
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator nginx, Installer nginx
Enter email address (used for urgent renewal and security notices) (Enter 'c' to cancel): xxx@xxx.com
-------------------------------------------------------------------------------
Please read the Terms of Service at
 You must agree in order to register with the ACME server at 
-------------------------------------------------------------------------------
(A)gree/(C)ancel: A
-------------------------------------------------------------------------------
Would you be willing to share your email address with the Electronic Frontier Foundation, a founding partner of the Let's Encrypt project and the non-profit organization that develops Certbot? We'd like to send you email about EFF and our work to encrypt the web, protect its users and defend digital rights.
-------------------------------------------------------------------------------
(Y)es/(N)o: Y
Which names would you like to activate HTTPS for?
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1: www.sunzhongwei.com
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Select the appropriate numbers separated by commas and/or spaces, or leave input blank to select all options shown (Enter 'c' to cancel): 1
Obtaining a new certificate
Performing the following challenges:
tls-sni-01 challenge for www.sunzhongwei.com
Waiting for verification...
Cleaning up challenges
Deployed Certificate to VirtualHost /etc/nginx/sites-enabled/xxx for set(['www.sunzhongwei.com'])
Please choose whether or not to redirect HTTP traffic to HTTPS, removing HTTP access.
-------------------------------------------------------------------------------
1: No redirect - Make no further changes to the webserver configuration.
2: Redirect - Make all requests redirect to secure HTTPS access. Choose this for new sites, or if you're confident your site works on HTTPS. You can undo this change by editing your web server's configuration.
-------------------------------------------------------------------------------
Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 2
Redirecting all traffic on port 80 to ssl in /etc/nginx/sites-enabled/xxx
-------------------------------------------------------------------------------
Congratulations! You have successfully enabled 
You should test your configuration at:

-------------------------------------------------------------------------------
IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
  /etc/letsencrypt/live/www.sunzhongwei.com/fullchain.pem
  Your key file has been saved at:
  /etc/letsencrypt/live/www.sunzhongwei.com/privkey.pem
  Your cert will expire on 2018-04-05. To obtain a new or tweaked version of this certificate in the future, simply run certbot again with the "certonly" option. To non-interactively renew *all* of your certificates, run "certbot renew"
 - Your account credentials have been saved in your Certbot configuration directory at /etc/letsencrypt. You should make a secure backup of this folder now. This configuration directory will also contain certificates and private keys obtained by Certbot so making regular backups of this folder is ideal.
 - If you like Certbot, please consider supporting our work by:
  Donating to ISRG / Let's Encrypt:  
  Donating to EFF:          

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sudo apt install python3-certbot-nginx

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listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/www.sunzhongwei.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/www.sunzhongwei.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

if ($scheme != "https") {
    return 301 
} # managed by Certbot

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sudo certbot renew --dry-run