What is the meaning of Cannot connect to the backend device

Document ID : KB000109474
Last Modified Date : 02/08/2018
Show Technical Document Details
Question:
When user click on a link on the Access page they sometimes get the "Cannot connect to backend device" error message.  We need to know what this means and what to do.
Answer:
The "Cannot connect to the backend device." message is generally caused by something preventing connection to the target device.  This could be caused by the system being down, a network problem, or something else.  You can test on the Config --> Tools page, using ping, traceroute, port scan and resolve name.