Why We Need SSL ?
SSL certificates are required for websites in order to protect user data, validate website ownership, prevent attackers from creating a false version of the site, and transmit trust to users.
What is Certbot?
Certbot is a free, open-source software tool for automatically using Let’s Encrypt certificates on manually-administrated websites to enable HTTPS.
- Server with CentOS 8
- Apache installed on the server with the configured virtual host for your domains.
Step 1 - Installing the Certbot Client
Add the CentOS 8 EPEL repository
$ sudo dnf install epel-release
Now Install Certbot with required packages
$ sudo dnf install certbot python3-certbot-apache mod_ssl
Step 2 - Getting a Certificate
To obtain a certificate that covers only one domain
$ sudo certbot --apache -d example.com
To obtain a certificate that covers multiple domains
$ sudo certbot --apache -d www.example.com -d example.com
You can also use
certbot utility prompt
$ sudo certbot --apache
Successful Installation output will be something similar to this
IMPORTANT NOTES: - Congratulations! Your certificate and chain have been saved at: /etc/letsencrypt/live/example.com/fullchain.pem Your key file has been saved at: /etc/letsencrypt/live/example.com/privkey.pem Your cert will expire on 2022-01-26. 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: https://letsencrypt.org/donate Donating to EFF: https://eff.org/donate-le
Step 3 - Testing
We learned how to install a free SSL certificate on your domain in a very basic and straightforward manner.