The goal of this Thesis is to design an application based on a Field Programmable Gate Array (FPGA) architecture, for security purposes. Such application consists in real-time processing the network packets exchanged across a wired Ethernet connection. This allows to filter the exchanged data according to a specific set of conditions, programmed by the user. Moreover, in order to guarantee a secure communication between two peers, it should also include an encryption scheme, to manage encryption/decryption of data in real time. As a result, this application is referred to as a toolbox, due to the different options of configuration. The device used for this purpose is an hybrid solution, defined as System on (Programmable) Chip (SoC), that embeds a classic CPU architecture into a FPGA logic-fabric.