Defining Network Functions Virtualization (NFV)

The goal of NFV is to transform the way that network operators architect networks by evolving standard IT virtualization technology to consolidate many network equipment types on to industry standard high-volume servers, switches and storage, which could be located in the data center, in the network or at end-customer premises.  NFV replaces traditional, custom-designed network equipment (black boxes) that continues to dominate the installed base of networks.


NFV provides for an open architecture with many flexible options for deploying an NFV solution. The typical architecture of NFV consists of three distinct layers:
Network functions virtualization infrastructure (NFVi) – the hardware and infrastructure software platform required to run network applications.
Virtual network functions (VNFs) – software applications that deliver specific network functions, such as routing, security, mobile core, IP multi-media subsystems, video, etc.
Management, automation and network orchestration (MANO) – the framework for management and orchestration of NFVi and various VNFs.

Virtual Firewall

A virtual firewall appliance is a network firewall service that provides packet filtering inside a virtualized environment. A virtual firewall appliance oversees and controls approaching and outgoing traffic. A virtual firewall appliance works in conjunction with switches and servers like a physical firewall. A virtual firewall appliance keeps an unapproved user from getting to and transmitting information and records and virtual firewall appliance also prevents an organization's employee from exchanging any sensitive information or documents. A virtual firewall appliance works in two modes: bridge mode and hypervisor mode. Like a conventional firewall framework, bridge mode works by diagnosing and observing the majority of the virtual machines incoming and outgoing traffic. In hypervisor mode, the virtual firewall appliance works in isolation from the physical network, dwelling in the center hypervisor kernel and dealing with the incoming and outgoing traffic of the virtual machine.

Virtual Firewall Features