We tested next generation firewalls by looking at seven areas important to network managers. We looked at features for building security policy, VPNs, applying NAT and QoS, enabling dynamic routing, and supporting high availability. We also looked at global management features, where the vendor provided a global management system, and evaluated other enterprise areas of concern, such as VLAN and link aggregation support. We looked into the application layer controls (such as blocking applications) and variations offered by different vendors. We also used very simple evasion to see if the next generation firewall could be easily fooled.”]
Source: https://www.csoonline.com/article/2131612/how-we-tested-next-generation-firewalls.html