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2.4. Install the CA root certificate as a Trusted Root Certificate

First strip the certificate from all its text to keep only the -CERTIFICATE- section

openssl x509 -in cacert.pem -out cacert.crt

Place this file on your web site as Your web server should have a mime entry for .crt files. Your certificate is ready to be downloaded by any browser and saved.

It is important to publish the root CA Certificate on a web site as it is unlikely that people will have it already loaded on their browser. Beware, somebody could fake your web site and fake your root CA Certificate. If you can have more than one way for users to get your certificate, it is unlikely that a hacker will be able to corrupt everything.

Microsoft proposes a windows update feature that will push approved root certificate to internet explorers out there. You can contact Microsoft to have your root certificate added in their database and maybe in their future releases.