The main function of network firewalls is to prevent propagation of data and applications which compromises the security of home network and business. The firewalls work in both ways, they either prevent traffic malicious data packets or they enter as well as exit from the protected network.
Firewalls are also a fundamental building block for network security ever since the emergence of the internet in late 1980s. According to reports, the firewalls are expected to be deployed either through software, hardware appliances or network hardware. However, this trend changed in 2009, as Next Generation Firewall (NGFW) was developed with the intention to design Deep Packet Inspection (DPI) of network traffic.
A report titled Hype Cycle for Threat-Facing Technologies in 2017 determined Firewall as a Service (FWaaS) as an ‘On the Rise’ trend and rated it as a ‘high benefit’.
Among the various advantages of FWaaS, Scalability, Unified Security Policy, Full Visibility of Network Traffic, Easier Maintenance and Simpler Architecture were known to be beneficial with FWaaS as a cloud-based service.
However, the challenges faced by FWaaS include Resistance to Adoption, owing to which the enterprise businesses are doubtful to move functions like security into cloud. Another challenge involves issues about Network Latency, which means that integration of SD-WAN and cloud services like FWaaS becomes more attractive for enterprises. Due to this characteristic, it becomes necessary for FWaaS providers to guarantee a network latency which is better than that of legacy firewalls.