Hi Tim,
You can connect to your ISY through SSL (port 443) by entering the following into your web browser:
https://xxx.xxx.xxx.xxxwhere xxx.xxx.xxx.xxx is the external router IP address.
If that doesn't work, try connecting internally by replacing the xxx.xxx.xxx.xxx with the ISY internal IP address just to verify that the ISY would respond over SSL if the data made it to the ISY.
MobiLinc can connect over HTTP or HTTPS depending on which Connect Method you have selected in My Settings. If you have Auto selected, MobiLinc will auto detect your ISY on Wifi. If the ISY is found, then MobiLinc will connect using HTTP. If the ISY isn't found over WiFi or you only have a 3G signal, then MobiLinc will connect over HTTPS.
Wes