In today's world, automating Cybersecurity has become a crucial aspect of companies strategy defense to ensure security and reliability against constantly evolving network security threats. Through the exploitation of Network Function Virtualization (NFV) and Software defined Networks (SDN) it is possible to express a series of Network Security Requirements (NSRs) for any given network with the aim to use the paradigm of network virtualization to automate and optimize the allocation and the configuration of Network Security Functions (NSFs), such as channel protection systems. Since a pure manual configuration is prone to human errors, it’s been addressed an approach which allow network administrators to specify NSRs in a high-level language with a software capable of automatically translate them, establishing a graph of the network without policy conflicts and with NSFs allocated and configured automatically.