As a result of the recent onslaught of Internet-based virus attacks and their effect on many companies’ operations, some organizations responded defensively by shutting down TCP ports that were vulnerable. Unfortunately, many quickly learned that other essential business applications relied on these same ports and that they had, unknowingly, shut down critical business applications. The problem highlights the need for enterprises to understand the functional behavior of existing networked business applications and specifically to inventory their port usage. The Blaster worm took advantage of the underlying behavior of networked applications to enable its rapid spread. Many other viruses and worms rely on similar vectors of infection. This behavior is based on the underlying common protocol used by all Internet applications as well as those running on most modern corporate networks. Full Story
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