
distribution speed of Internet-transported attacks. Over time, net-
work attacks have evolved into application-level attacks and blended
attacks. Recently, an entirely new class of application-specific threats
have arisen, thereby circumventing widely deployed firewalls. In
addition, most experts in the industry have made numerous analyses
related to the imperative need for application security solutions.
20.3 Conclusions
Recently, industry analysts agreed that one of the most pressing
issues facing firewalls today and in the future is finding ways to
address growing complexity in networks and applications. Firewalls
have changed roles many times since ...