Warning Messages When Accessing an SSL-enabled Website

Sometimes, when accessing an SSL-enabled website, users get a warning popup window, telling that something is not quite right with the website. These are some of the most common causes:

• The certificate has expired. Commercial certificates are usually valid for a limited period of time, after which they expire.

• The domain in the certificate does not match the domain. This will happen if the certificate was issued for a different website.

• The certificate has been signed by a Certificate Authority that is unknown or not trusted by the browser. This can happen, for example, if you are using a self-signed certificate for testing purposes.