I want say very short steps to make you page secure SSL with "Let's Encrypt"
Free-SSL
Our case, we consider a server where we have ssh access, and we can modify configuration files from apache and restart services.
First step, install certbot.
yum install certbot
Second, request key for you webpage:
certbot certonly --webroot -w /var/www/html/roundcubemail/ -d webmail.your-domain.com
If you run for the first time here, you will get some questions:
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator webroot, Installer None
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
cancel): postmaster@chris-exim.ro
Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server at
https://acme-v01.api.letsencrypt.org/directory
(A)gree/(C)ancel: A
Next step you will get the key !
IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at:
/etc/letsencrypt/live/webmail.your-domain.com/fullchain.pem
Your key file has been saved at:
/etc/letsencrypt/live/webmail.your-domain.com/privkey.pem
Your cert will expire on 2018-10-07. To obtain a new or tweaked
version of this certificate in the future, simply run certbot
again. 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
Final step create you own VHOST config in web server.
webmail
<VirtualHost 192.168.0.1:443>
SSLEngine On
SSLCertificateFile /etc/letsencrypt/live/webmail.your-domain.com/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/webmail.your-domain.com/privkey.pem
ServerAdmin postmaster@your-domain.com
ServerName webmail.your-domain.com
DocumentRoot /var/www/html/roundcubemail
CustomLog /var/log/httpd/webmailssl_access.log common
ErrorLog /var/log/httpd/webmailssl_error.log
</VirtualHost>
and restart you apache server: systemctl restart httpd
Posted from my blog with SteemPress : http://blog.ceae.info/free-ssl-for-web-easy-way/