The document discusses Advanced Evasion Techniques (AETs) and introduces Evader, a software tool from Stonesoft. It summarizes that AETs are hacking techniques that evade detection, most security devices cannot detect AETs, and Evader allows organizations to test if their defenses would stop an AET-borne attack. Evader is presented as a free and easy-to-use way for security teams and vendors to determine the real-world effectiveness of networks against AETs.