In current era cloud networks have been one of the major adopters of virtual networks, with
virtual network techniques being used to abstract the distribution of physical and logical
resources. A considerable amount of third-party cloud providers launches their
applications on the cloud, keeping in mind innumerable requirements posed relates to the
performance, security, and management of the cloud providers use various hardware
middleboxes to execute various network operations and improve the cloud’s capacity to
meet tenant needs. Even while middleboxes are critical to the cloud, the prices,
manageability, and performance overhead are a concern for the cloud community. To
address these issues, academics have proposed Firewalls as an alternative to hardware
middleboxes such as NAT. Software programs provide comparable functionality while
vastly improving flexibility, manageability, and cost-effectiveness.
