If the Controller is unable to bind itself to a valid IP address and/or interface, the following error will be seen in the Controller's log:
/opt/SecureSpan/Controller/var/logs/sspc_0_0.log
2019-05-17T11:51:50.583+1000 SEVERE 1 com.l7tech.server.processcontroller.ProcessControllerDaemon: Process controller unable to bind listener, please ensure server ip address and port are valid and available and restart. Error creating bean with name 'servletContainer' defined in class path resource [com/l7tech/server/processcontroller/resources/processControllerServletContainerContext.xml]: Invocation of init method failed; nested exception is java.net.BindException: Cannot assign requested address (Bind failed)