How To Install Let’s Encrypt SSL using DirectAdmin

Install Let’s Encrypt SSL using DirectAdmin

In this tutorial, we will show you how to install Let’s Encrypt SSL using DirectAdmin. For those of you who didn’t know, Let’s Encrypt is a free open certificate authority (CA) that provides free certificates for websites and other services. The service is backed by the Electronic Frontier Foundation, Mozilla, Cisco Systems, and Akamai. Unfortunately, LetsEncrypt.org certificates currently have a 3 month lifetime. This means you’ll need to renew your certificate quarterly for now.

This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step install Let’s Encrypt SSL using DirectAdmin on CentOS 7 server.


  • A server running one of the following operating systems: CentOS Linux.
  • It’s recommended that you use a fresh OS install to prevent any potential issues.
  • SSH access to the server (or just open Terminal if you’re on a desktop).
  • A non-root sudo user or access to the root user. We recommend acting as a non-root sudo user, however, as you can harm your system if you’re not careful when acting as the root.

Install Let’s Encrypt SSL using DirectAdmin

Step 1. First, let’s start by ensuring your system is up-to-date.

yum clean all
yum -y update

Step 2. Log in to your DirectAdmin VPS via SSH as user root.

First, log in to your DirectAdmin VPS:

ssh root@Your_IP_Adress -p Port_number

Step 3. Get the latest Let’s Encrypt script

Next, we will clean the software list and make sure we’ve got the latest Let’s Encrypt script:

cd /usr/local/directadmin/custombuild/
./build clean all
./build update
./build letsencrypt

Then, rewrite the configuration files:

./build rewrite_confs

Step 4. Configure DirectAdmin.

In order to enable Let’s Encrypt support on DirectAdmin, open the DirectAdmin configuration file:

nano /usr/local/directadmin/conf/directadmin.conf

You should also make sure that SNI is enabled in DirectAdmin by adding/modifying this line:


Save the file and restart DirectAdmin for the changes to take effect:

echo "action=directadmin&value=restart" >> /usr/local/directadmin/data/task.queue; /usr/local/directadmin/dataskq d2000

With this step Let’s Encrypt is enabled in DirectAdmin and we can proceed with the installation. Log in to the control panel at https://your-domain:2222 with your username and go to ‘SSL Certificates’ under ‘Advanced Features’:

Install Let’s Encrypt SSL using DirectAdmin

If the SSL option is disabled for the selected domain as shown in the screenshot below, you need to enable it by clicking ‘here’:

Install Let’s Encrypt SSL using DirectAdmin

If you properly enabled Let’s Encrypt, you will see the ‘Free and automatic certificate from Let’s Encrypt’ option. Check the check-box next to the Let’s Encrypt option and enter all necessary details for your domain below:

Install Let’s Encrypt SSL using DirectAdmin

Then click the ‘Save’ button and a free Let’s Encrypt SSL certificate will be automatically installed.

Finally, Restart the Apache web server for the changes to take effect:

systemctl restart httpd

Congratulations! You have successfully installed Install Let’s Encrypt SSL DirectAdmin. Thanks for using this tutorial for installing Let’s Encrypt SSL using DirectAdmin on CentOS 7 systems. For additional help or useful information, we recommend you check the official DirectAdmin website.

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r00t is a seasoned Linux system administrator with a wealth of experience in the field. Known for his contributions to idroot.us, r00t has authored numerous tutorials and guides, helping users navigate the complexities of Linux systems. His expertise spans across various Linux distributions, including Ubuntu, CentOS, and Debian. r00t's work is characterized by his ability to simplify complex concepts, making Linux more accessible to users of all skill levels. His dedication to the Linux community and his commitment to sharing knowledge makes him a respected figure in the field.
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