Achieving Defense-in-Depth with Internal Firewalls

A single firewall at the Internet gateway is no longer sufficient. Currently there is a trend toward more and more outside access to the enterprise network by employees, partners, customers, and suppliers. In addition, attackers are becoming more sophisticated. A sound security perimeter today requires more than a single firewall connected at the Internet router. By segmenting the network with multiple firewalls, we can achieve the holy grail of network security - Defense-In-Depth.