If your missing the Smoothwall Certificate Authority in your browser or OS you may run into this error ...
Install the SCCSD Certificate Authority into your browser or OS.
After you have the certificate file on the device, click the file to allow the iOS system to install the certificate.
Download the certificate file on the device, send it as an email attachment or host it on a secure website.
Click the file to allow the Android system to install the certificate.
Provide an alias name for the certificate when you are prompted.
Follow the above link and check all "Trust" check boxes and click "OK"