Raspberry Pi boards are fantastic for any project — they’re cheap, easy to use, can run a wide range of possible operating systems, and provide programmable GPIO pins as well as multi-core CPU availability and multiple USB ports.
You can use Raspberry Pi boards for all kinds of automation and information gathering projects. But, if you are not careful, your little hobby project might result in a security risk that acts as an entry point into your network.
This article gives tips how to secure your Pi project. Most of rhose tips also apply to almost any Linux system.