The rapid evolution of digital infrastructures, accelerated by the proliferation of the Internet of Things (IoT) and virtualization, has increased the complexity of securing distributed environments while raising concerns about energy efficiency. Traditional manual configuration of security controls is no longer feasible in dynamic networks, where even small errors can compromise protection. Automation addresses this challenge by ensuring correctness and adaptability, but current approaches often overlook the energy consumption of security operations. This thesis focuses on the integration of network security automation with energy-aware strategies in Edge-to-Cloud (E2C) environments, where resources are dynamically distributed between endpoints, edge devices, and cloud infrastructures.