FortiGate Users: How to Install a Wildcard SSL Certificate

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How to install a wildcard SSL certificate on a FortiGate is a topic that pops up in conversation with our customers once in a blue moon. Heck, you may even be one of them! There are a few different reasons why you may want to install an SSL/TLS certificate on FortiGate — for example, it could have to do with wanting to secure your communications via a virtual private network (VPN).

Regardless of why you’re here, we thought we’d take a moment to walk you through the process on FortiGate for how to install a wildcard SSL certificate. It’s not a difficult process, but if you aren’t familiar with the mechanics of the wildcard installation process, it can be a bit confusing.

Here’s what you need to know:

Your Step-by-Step Directions on How to Install a Wildcard Certificate on FortiGate

Step One: Buy a Wildcard SSL Certificate

If you haven’t already, the first thing you need to do before you can even start the installation process is purchase a wildcard SSL certificate and generate a certificate signing request (CSR). After all, you can’t install what you don’t have, can you?

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You can generate a CSR either using FortiGate itself or using cPanel. The choice is up to you.

Step Two: Download and Extract your Wildcard SSL Certificate

To install your wildcard SSL certificate on FortiGate, you’ll first need to get your digital certificate files.

  1. Go to your inbox — You should have an email from the CA or company you purchased the certificate from. Download the .zip file that contains your wildcard SSL certificate.
  2. You’ll first need to extract this .zip file into the directory where you store other certificates.

Step Three: Install Your Intermediate CA Certificate Bundle

You’ll want to import your SSL certificate that’s saved locally.

  1. You’ll need to log in to your FortiGate unit and go to the Settings.
  2. Under the Import drop-down menu and select Import Local Certificate.
  3. In the Type drop-down menu, choose the certificate that you wish to install — in this case, a PKCS #12 Certificate.
  4. Select OK.

Step Four: Configure Your FortiGate Unit

  1. Go back to FortiGate and navigate to the VPN section. Under SSL, select Settings.
  2. Look under the Connection Settings and find the Server Certificate
  3. Find the certificate you want to install in the drop-down menu.
  4. Select Apply.

Step Five: Save and Restart FortiGate

This is a pretty straightforward step and we’re sure you don’t need directions for this one.

You’ve now successfully installed and configured your SSL certificate on FortiGate.