If you're interested in a simple statistical display for your Sophos UTM appliance or other Linux server, then the following project by Arduino forum member pazu will be of interest. This can be used to display CPU load, network throughput, system uptime and more.
Doing so is quite simple, the hardware requires an LCD to an Ethernet-enabled Arduino board which is then patched in to the local area-network. The software side of the project uses a script on the server which sends a simple HTTP request with system statistics to the Arduino which then displays them on the LCD, for example:
When putting together your next Internet-enabled Arduino project - save time, space and money with the Freetronics EtherTen. Apart from being fully Arduino Uno-compatible, it has onboard Ethernet, microSD socket, full USB interface (so you don't need a costly FTDI cable just to upload a sketch!) and supports optional Power-over-Ethernet.