Can I connect to a camera using SSL?

Yes.  Qumulex can connect via SSL to your security cameras if you specify the proper ports within the Camera configuration page of QxControl (usually 443), and set the camera accordingly if necessary.  
Before embarking on a large install it would be worth testing the connection on a single camera to ensure everything is clear.  We have seen some which present connection difficulties due to abnormal ONVIF integrations from the manufacturers.