How to install Let's Encrypt SSL on cPanel hostname?

In this article, I will guide you about using the Let’s Encrypt SSL certificate for cPanel hostname. As you know, cPanel provides a free SSL certificate for cPanel hostname as default. But some times it not works or limit issue, so you can use the following steps to have a valid SSL certificate for your cPanel services.

Install the Certbot from EPEL

Run following command as root user to install certbot from epel repo

yum install --enablerepo=epel certbot

Create deploy-hook script for Certbot

Create hostname-ssl.sh file and copy below contents to it and save.

vi /usr/local/bin/hostname-ssl.sh
#!/bin/sh
set -e

/bin/cat /etc/letsencrypt/live/$HOSTNAME/privkey.pem /etc/letsencrypt/live/$HOSTNAME/cert.pem > /var/cpanel/ssl/cpanel/cpanel.pem
/bin/chown cpanel:cpanel /var/cpanel/ssl/cpanel/cpanel.pem

/bin/cat /etc/letsencrypt/live/$HOSTNAME/privkey.pem > /var/cpanel/ssl/exim/exim.key
/bin/cat /etc/letsencrypt/live/$HOSTNAME/cert.pem > /var/cpanel/ssl/exim/exim.crt
/bin/chown mailnull:mail /var/cpanel/ssl/exim/exim.*

/bin/cat /etc/letsencrypt/live/$HOSTNAME/privkey.pem > /var/cpanel/ssl/ftp/ftpd-rsa-key.pem
/bin/cat /etc/letsencrypt/live/$HOSTNAME/cert.pem > /var/cpanel/ssl/ftp/ftpd-rsa.pem
/bin/cat /etc/letsencrypt/live/$HOSTNAME/privkey.pem /etc/letsencrypt/live/$HOSTNAME/cert.pem > /var/cpanel/ssl/ftp/pure-ftpd.pem
/bin/chown root:wheel /var/cpanel/ssl/ftp/*

/bin/cat /etc/letsencrypt/live/$HOSTNAME/privkey.pem > /var/cpanel/ssl/dovecot/dovecot.key
/bin/cat /etc/letsencrypt/live/$HOSTNAME/cert.pem > /var/cpanel/ssl/dovecot/dovecot.crt
/bin/chown root:wheel /var/cpanel/ssl/dovecot/dovecot.*

/bin/systemctl restart cpanel.service
/bin/systemctl restart exim.service
/bin/systemctl restart pure-ftpd.service
/bin/systemctl restart dovecot.service

#If above cpanel commands doesn't work for your cpanel version. Replace below lines with above lines
and remove #.

#/scripts/restartsrv_cpsrvd
#/scripts/restartsrv_ftpd
#/scripts/restartsrv_dovecot
#/scripts/restartsrv_exim

Now make it executable

chmod +x /usr/local/bin/hostname-ssl.sh

Issue a certificate for cPanel hostname

With the following command you will be able to issue a Let’s Encrypt valid certificate for cPanel HOSTNAME

certbot --debug certonly -a webroot --agree-tos --webroot-path=/usr/local/apache/htdocs --deploy-hook=/usr/local/bin/hostname-ssl.sh --renew-by-default -d $HOSTNAME

Certificate renew cron job

For the certificate, auto-renew add the following lines in your cron job file.

crontab -e
00 02 * * * certbot renew

That's all.

  • install-cpanel-hostname, cpanel-ssl, hostname-ssl, cpanel-hostname-ssl, free-hostname-ssl, cpanel-free-ssl
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