Hi Russell If you've forgotten the password too then the easiest way would be to attach a null modem serial terminal to the controller 115200 baud, 8,n,1 no flow control. Reboot the controller and choose rescue mode when the controller starts, within the menu there choose the authentication services menu, set the authentication to local and reset passwords to factory default (admin/abc123) Once you've rebooted the controller you can login via the CLI, type "topology" and following that "show" will tell you the IP of the defined interfaces. You can then manage the controller from there using the GUI as normal and reset the interface IP to what you require. If you still have problems after that I would recommend you call into the GTAC and they will walk you through the procedure to get you running again. -Gareth