How To Secure Apache with mod_md Let's Encrypt on Ubuntu 20.04 LTS

To secure Apache with mod_md and Let's Encrypt on Ubuntu 20.04 LTS, follow these steps:

1. Install the Apache mod_md module:

sudo apt update
sudo apt install libapache2-mod-md

2. Enable the mod_md module:

sudo a2enmod md

3. Restart Apache to apply the changes:

sudo systemctl restart apache2

4. Install the Let's Encrypt client (certbot):

sudo apt install certbot

5. Obtain a certificate from Let's Encrypt using the certbot client:

sudo certbot --apache

This will start the interactive certbot wizard, which will guide you through the process of obtaining a certificate. Follow the prompts to enter your domain name, email address, and agree to the terms of service. Once the process is complete, you will have a valid SSL certificate installed on your Apache server.

6. Test your configuration by accessing your website over HTTPS. You should see the green padlock icon in your browser's address bar, indicating that the connection is secure.

That's it! Your Apache server is now secured with mod_md and a Let's Encrypt SSL certificate.