What is CA Bundle in SSL and how to create it?
When you install an SSL certificate, your server may ask you to import a CA bundle along with your main certificate. This is where users usually run into trouble. They either don't know where to find the CA bundle or they try to create one.So, what is a CA bundle ? This guide will walk you through the key aspects of the CA Bundle file and show you how to obtain it when setting up SSL.
Table of contents
What is CA Bundle in SSL?
Why is CA Bundle important?
How to get CA package?
How to create CA bundle from CRT?
Can I generate a CA package?
What are some examples of CA bundles?
What is CA Bundle in SSL?
CA Bundle is a file containing the root and intermediate mobile app development service certificates . Together with your server's SSL certificate (issued specifically for your domain), these files complete the SSL chain of trust . The chain is necessary to improve the compatibility of certificates with web browsers, email clients, and mobile devices.
Why is CA Bundle important?
The CA bundle is required for older browsers and legacy systems. If the intermediate certificate is missing or configured incorrectly, browsers will not recognize your certificate.
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Missing intermediate link is one of the most common reasons for SSL connection errors . To avoid this problem, you must import the correct CA Bundle file. Moreover, the certificates inside the CA Bundle must be in the correct order.
How to get CA package?
Not all CAs will send you a CA Bundle file. You may receive the root and intermediate certificates as separate files. If your certificate is in PKCS#7 format (suitable mainly for IIS/Microsoft Exchange), the bundle is already included in your certificate and you do not need to install it separately.
After successfully submitting your SSL certificate application, the CA will provide you with all the necessary installation files. Download and unzip their contents on your device. If there is a file with the .ca-bundle extension, all you need to do is upload it to your server in the appropriate field.
If you received the root and intermediate certificates as separate files, you should combine them into one to create a CA Bundle file. Here's how to do it:
How to create CA bundle from CRT?
To create a CA Bundle file, you will need a text editor such as Notepad and, of course, the root and intermediate certificates as separate files.
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