Install SSL Certificate from PFX file

Installing SSL certificate is crucial for securing websites, ensuring encryption of data transmission between users browser and the site to protect sensitive information. Let's explore the process of installing SSL certificate from PFX file, providing step-by-step instructions for a seamless setup.

Extract Private Key and Certificate from PFX file

PFX (Personal Exchange Format) file, also known as a PKCS #12 file, is a binary format used to store a certificate and its corresponding private key. OpenSSL command can be used to extract both the certificate and private key from a PFX file.
openssl pkcs12 -in -out -nodes
In case the PFX file is password protected, you will be prompted to enter the password as "Enter Import Password". If the password is valid, file will be saved in the current directory. The first section of the file contains the private key, which can be saved as The second section contains the certificate body, which can be saved as file.
Once the key and crt files are prepared, you can proceed to configure them on your http server, such as Apache or Nginx. Alternatively, if you are using AWS Elastic Load Balancer (ELB), you can utilize AWS Certificate Manager (ACM) to manage your SSL certificates and associate them with your load balancer.

Configure SSL Certificate using Nginx

To configure SSL in Nginx, need to upload the required files to the server using FileZilla or another FTP client. Once uploaded, reference these files in the Nginx server block configuration. Finally, restart Nginx to apply the changes.
server { listen 443 ssl; server_name; ssl_certificate "path/to/cert/"; ssl_certificate_key "path/to/cert/"; ssl_protocols TLSv1.2 TLSv1.3; ssl_ciphers TLS-CHACHA20-POLY1305-SHA256:TLS-AES-256-GCM-SHA384:TLS-AES-128-GCM-SHA256:HIGH:!aNULL:!MD5; ssl_prefer_server_ciphers off; }

Configure SSL Certificate using ACM and ELB

To import a certificate using AWS Certificate Manager, navigate to the Certificate Manager service and select the "Import Certificate" option from the left-hand menu. Paste the certificate and private key into the respective text boxes, add tags accordingly, and review the details before confirming the import certificate.
Import SSL Certificate in AWS Certificate Manager
Upon successful completion, the imported certificate will appear in the list of certificates.
AWS Certificate Manager Certificates List
When creating a new Application Load Balancer, you can set up the Default Certificate by selecting the certificate imported in the previous step under the "Default SSL/TLS server certificate" section.
AWS Elastic Load Balancer Default Certificate Setup
After confirming other details, proceed to create the new load balancer. Once the ELB is created, you can verify its configuration by accessing HTTPS:443 from the Listeners and Rules tab. Then, navigate to the "Certificates" tab on the details page to confirm the setup.
AWS ELB HTTPS Listener Certificate
You can utilize the "Change Default" feature to change the default certificate if the current one expires or for any existing HTTPS listener.
If you're maintaining the same load balancer to support multiple domains on the same port, you can assign different certificate for each domain using the "Add SSL Certificates for SNI" feature.
Add SSL Certificate for SNI
Select the certificate you want to add from the list of available certificates and choose "Include as Pending below".
Available Certificate for SNI
After confirming the selection, you need to proceed by clicking on "Add Pending Certificates".
Add Pending Certificate for SNI
The certificate will now be available in the list of "Listener Certificates for SNI".
Listener Certificates for SNI
If you've followed along, you can now verify the SSL certificate and its expiry date from your preferred web browser by visiting your website.