Parts of my website can be accessed with HTTPS only. One example for this is my Bugzilla installation. When you visit these parts of my website your browser will probably display some sort of warning that the identity of the website could not be verified. Since my SSL certificates are all based on CAcert, you can get rid of the warning if you install the CAcert root certificates in your browser or system. You can get the certs directly from the CAcert website (click on the PEM version if you use Firefox).