In the last few years, a so called whole new generation of firewalls have been released by various vendors, most notably Network Application Firewalling. While this technology has gained a lot of market attention, little is actually known by the general public about how it actually works, what limitations it has, and what you really need to do to ensure that you're not exposing yourself. This presentation will examine/demystify the technology, the implementation, demonstrate some of the technology and implementation specific vulnerabilities, exploits, what it can and can't do for you, and how to defend yourself against potential weaknesses.