Thanks for the reply Žygimantas
I have rebooted the device, but have not yet done a factory reset, I was hoping to avoid that as the device is quite remote.
FW ver.: RUT9XX_R_00.06.07.5
The only change that has been made recently was to try and add the device to RMS. At the time I could access the devices on the LAN ports. Shortly after we noticed we could not. When adding the device to RMS, it appears in the RMS console and some stats have been retrieved, but on the device it says it has failed to connect to RMS as it could not resolve the RMS hostname.
I've sent you the troubleshooting file.