In the ever-evolving landscape of network security and orchestration, the Network Functions Virtualization (NFV) paradigm is a novel innovative paradigm revolutionizing networking technology. NFV presents significant advantages over traditional networks by decoupling network functions from hardware appliances. This innovation enables the deployment of software processes as service functions on versatile general purpose servers. This approach introduces unparalleled flexibility and agility, enabling the creation of Service Graphs that generalize the Service Function Chain (SFC) concept. These graphs describe the organization and connection of network functions essential for end-to-end service delivery. However, a challenge arises in this context. While service designers are typically responsible for creating Service Graphs, security managers separately handle the allocation and configuration of Network Security Functions (NSFs) like firewalls.