They also employ multiple evasion tactics. To overcome traditional defenses, attackers commonly use headless browser software, such as PhantomJS or a Selenium WebDriver. These attacks are highly disruptive and difficult, if not impossible, for IP-based defense systems to distinguish between legitimate and malicious visitors. Using real IP addresses, they establish a three-way TCP handshake and successfully bypass cookie and JavaScript challenges. In general, dynamic IP attacks target Layer 7, the application layer. This paper outlines some of the most common variations of dynamic IP attacks, explores challenges in defending against them, and points to best practices for thwarting these attacks. At the forefront of these roguelike tactics: serving up dynamic IP addresses.ĭynamic IP addresses are an effective way to defeat IP-based defense systems: launch application-level attacks that originate from real-but dynamic-IP addresses. In recent years, cyber attackers have adopted a new, more surreptitious operational mandate one that employs a set of strategies and technologies that dramatically complicates the detection process.

At the forefront of these roguelike tactics: serving up dynamic IP addresses.

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