Abstract
ur LAN? Self-propagating worms such as Slammer and MSBlaster Do you know what is connected to yo make the presence of unmanaged or rogue systems a major security threat. Many organizations hit by Slammer and Blaster were infected by external systems that were brought in and attached to their internal network, and the intensity of the attack was amplified by unmanaged (and unpatched) systems on internal local area networks (LANs). This chapter provides guidance for operations, support, and security personnel on how to managing common types of unmanaged systems, including systems that are known to the organization and those that are not. The text assumes the reader already has a standard process (and associated technology) for managing the majority of their systems and is looking for guidance with systems that are not or cannot be subject to the standard process. This chapter is a collection of both process and technology practices from the authors’ experiences and is, to the best extent possible, vendor and industry neutral. Where do unmanaged or rogue systems come from? Vendors and contractors are a common source. They are often allowed to attach their laptops to company LANs for product demonstrations, testing, and project work. A second source is company developers and engineers, who often build systems for testing and prototyping purposes outside the standard build and patch processes. Another common source is third-party products or systems with an embedded operating system (OS). Other sources include home PCs used for virtual private network (VPN) access and personally owned portable systems (i.e., laptops) that get infected outside the organization and are brought in and connected to the corporate LAN.
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