To install an SSL certificate on Ubuntu using a Nginx server, acquire a digital SSL certificate first and then log into your Ubuntu-hosted server using Nginx as the web server. Next, you will have to create a directory for the SSL certificate files and save all SSL certificate files there. You will need to restart the Nginx server to complete the Ubuntu Ngnix SSL installation process.

Setting up an SSL certificate when hosting your website on Ngnix or any other web server is important to protect your user’s data from hackers. An SSL certificate encrypts the data transmission process, creating a secure communication tunnel between a web browser and a web server.

In this guide, you will learn how to install an SSL certificate on Ubuntu using the Nginx web server.

How to Install SSL on a Nginx Web Server?

Installing an SSL certificate on Ubuntu using a Nginx web server is a simple process. However, to successfully install the SSL certificate, you will need to keep these prerequisites in mind:

  • Server Certificate

You receive this certificate from the Certificate Authority (CA) for your domain. You may receive this certificate over email. If not, you can download it by visiting your hosting account’s dashboard and clicking on your order.  

  • Intermediate Certificates

An intermediate certificate verifies the server certificate at the website level. It is a verification device that tells a browser that a certificate was issued on a safe and valid source or from the CA’s root certificate.  

  • Private Key

All SSL certificates require a private key to function. A private key is a file that encrypts or decrypts data sent between the client and server. SSL Certificate owners create a private key, and no one besides them can create it.  

ALSO READ : What is SSL Certificate and What are its Benefits 

Now that you know about certificates that you need to acquire before installing an SSL certificate, it’s time to look at how to install SSL on a Nginx web server.   

Step 1: Log Into The Server Using SSH

Logging into your server using a Secure Shell or SSH encrypts network traffic between your computer and the server, preventing malicious attacks. After logging into your server, check whether the SSL client software is available, as it is important to install an SSL certificate. 

 Step 2: Generate a CSR

The next step is to generate a Certificate Signing Request (CSR) file by sending a request to the CA. Here’s how you can generate a CSR file:  

  • Open a text editor, such as a Notepad or a Word document, to copy the CSR file and submit it to the CA during your order process.  
  • After the CA validates the CSR file, it issues an SSL certificate. 

Step 3: Copy Your Certificate Files to the Server

Once the CA validates the CSR file, it sends the SSL certificate via email. Download the folder, extract the server, intermediate certificates, and private key file (titled certificate.crt, ca-bundle.crt, and private.key), and upload them to the Ubuntu server in /etc/ssl/ directory.  

Step 4: Edit the Nginx Configuration File

Open the configuration file for your website in a text editor. The configuration files are generally located in /etc/nginx/sites-available/your_site_name, where your_site_name is your site’s name. If you don’t have a dedicated configuration file for your site, you may need to create one or use /etc/nginx/nginx.conf.  

Step 5: Add SSL Configuration to the Server Block

Within the configuration file, locate or create a server block for HTTPS. This ensures that your website is accessible only via the HTTPS protocol. This not only protects your user data but also safeguards your website’s security.

Step 6: Test Nginx Configuration for Errors

Run the following command to check the syntax of your configuration file: “bash sudo nginx -t.” If there are any errors, review your configuration, correct the issues, and re-run the test.

Step 7: Reload Nginx to Apply Changes

Once the configuration test passes, restart Nginx to enable SSL using the command- “bash sudo systemctl restart nginx.”  

Step 8: Verify SSL Installation

Visit your website at `https://yourdomain.com` to confirm that it loads securely. Look for a padlock icon in the address bar to ensure that SSL is properly configured.

Now that we have seen how to install SSL on a Nginx server, let’s look at how SSL certificates work.   

ALSO READ : Different Types of SSL Certificates Explained 

How do SSL Certificates Work?

SSL certificates ensure that any data transfers between the user and your website remain impossible to read. This data includes potentially sensitive information such as names, addresses, credit card numbers, or other financial details. It uses encryption algorithms to scramble data in transit, which prevents hackers from reading it.

Here’s a detailed investigation of how SSL certificates work:

  1. A browser or server attempts to connect to a website (i.e., a web server) secured with SSL.  
  2. The browser or server requests that the web server identify itself. The web server sends the browser or server a copy of its SSL certificate in response.  
  3. The browser or server checks the authenticity of the SSL certificate. Once the certificate is verified, the web server starts an SSL-encrypted session.  
  4. Encrypted data is shared between the browser and the web server. This process is sometimes referred to as an SSL handshake.  

Why You Need an SSL Certificate

Websites need SSL certificates to keep user data secure, verify the website’s ownership, and prevent attackers from creating a fake version of the site. SSL certificates help keep online interactions private and assure users that the website is authentic and safe to share private information with.

An SSL certificate helps to secure information such as:  

  • Login credentials  
  • Credit card transactions or bank account information  
  • Personally identifiable information — such as full name, address, date of birth, or telephone number  
  • Legal documents and contracts  
  • Medical records  
  • Proprietary information 

ALSO READ : TLS Certificates vs. SSL Certificates: What’s the difference? 

Conclusion

In conclusion, securing your SSL certificate for Ubuntu using Nginx webserver is essential to protect your site from attacks and gain users’ trust. Following our how to install SSL on a Nginx server will ensure a secure and encrypted connection for all visitors.   

Looking to get an SSL certificate? Click here to explore SSL options that best fit your requirements and start securing your site today!  

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