Most of the major web browsers, such as Firefox, Chrome, and Chromium, come with their own pre-defined database of trusted CAs and their associated certificates. When you create a private CA, you'll need to import the CA certificate into your browser's trust store. Otherwise, your users will keep receiving messages about how the sites that they're viewing are using untrusted certificates. Indeed, that's the case with our Dogtag server. Any user who accesses it to request a certificate will receive a warning about how the CA is using a non-trusted certificate. We'll fix that by exporting the CA certificate from the Dogtag server and importing it into all of your users' browsers. Let's dig in, shall we?