How To Install Let’s Encrypt SSL With Apache on CentOS 7

Install Let’s Encrypt SSL With Apache on CentOS 7

In this tutorial, we will show you how to install Let’s Encrypt SSL With Apache on CentOS 7 server. For those of you who didn’t know, LetsEncrypt 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 installation Let’s Encrypt SSL with Apache on a CentOS 7 server.


  • A server running one of the following operating systems: CentOS 7.
  • 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 With Apache on CentOS 7

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

yum clean all
yum -y update

Step 2. Installing Let’s Encrypt SSL using Certbot.

In CentOS 7, you can find Certbot on the EPEL repository; if you enable it, just install what you need:

yum install epel-release
yum install python-certbot-apach

Certbot has a fairly solid beta-quality Apache plugin, which is supported on many platforms, and automates both obtaining and installing certs:

certbot --apache

After that, you’ll see a guide to customize your options, just like this:

Install Let’s Encrypt SSL With Apache on CentOS 7

Enter the domain you want to secure; then, Certbot will prompt you to enter your email address:

Install Let’s Encrypt SSL With Apache on CentOS 7

Next, you will choose the Virtual Host file, being the default ssh.conf. After that, you can decide whether to enable both HTTP and HTTPS access or redirect to HTTPS. The secure option is the second one (HTTPS). At the end of the procedure, Certbot will display a message containing configuration information.

Step 3. Configuration CentOS SSL.

First, edit the Virtual Host file you specified during configuration through Certbot. If you used the default one, the file should be /etc/httpd/conf.d/ssl.conf:

SSLProtocol All -SSLv2 -SSLv3
SSLHonorCipherOrder On
Header always set Strict-Transport-Security "max-age=63072000; includeSubDomains; preload"
Header always set X-Frame-Options DENY
Header always set X-Content-Type-Options nosniff
# Requires Apache >= 2.4
SSLCompression off 
SSLUseStapling on 
SSLStaplingCache "shmcb:logs/stapling-cache(150000)" 
# Requires Apache >= 2.4.11
SSLSessionTickets Off

Save and close the file. Restart the apache service for the changes to take effect:

systemctl restart httpd.service

Step 4. Automating renewal Let’s Encrypt.

Certbot can be configured to renew your certificates automatically before they expire. Since Let’s Encrypt certificates last for 90 days, it’s highly advisable to take advantage of this feature. You can test automatic renewal for your certificates by running this command:

certbot renew --dry-run

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

VPS Manage Service Offer
If you don’t have time to do all of this stuff, or if this is not your area of expertise, we offer a service to do “VPS Manage Service Offer”, starting from $10 (Paypal payment). Please contact us to get the best deal!






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.
Back to top button