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Reports from Mazu Networks' Customer-base Validate the Need for Network Anomaly Detection Systems to Effectively Contend with New Threats and Subsequent Variants

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CAMBRIDGE, Mass. - August 18, 2005 - Mazu Networks, the leading provider of behavior-based, network security solutions, today announced that Mazu Profiler™ enabled their customers to quickly detect and contain the Zotob worm, while significantly reduce future exposure by malicious code variants. With nonstop news coverage on Zotob's worldwide success in compromising corporate networks, it is clear that worms continue to be a serious problem that traditional security approaches are not effectively addressing.

Mazu Profiler™, the leading network anomaly detection system specifically designed to protect the internal network, proved successful in contending with Zotob because it allowed Mazu Networks' customers to respond:

• Quickly: Mazu Profiler alerted on Zotob's first infection point and tracked how the worm was propagating, noting the ports and protocols being exploited and listing all infected systems. Network anomaly detection proved beneficial because previous knowledge of the malicious code was not needed to identify and isolate Zotob.
• Accurately: Mazu Profiler alerted on actual activity versus flooding security teams with non-essential alerts warning of hypothetical threats.
• Safely: Mazu Profiler's real-time impact analysis helped customers avoid actions that could disrupt critical services. Through intelligence gained from Mazu Profiler, customers could quickly verify whether the ports being exploited by the worm were also connected to key systems and services. Consequently, customers could isolate infected systems or shutdown ports being used for worm propagation without adversely affecting business operations.

Mazu Profiler enabled Mazu Networks' customers to recover quickly and reduce opportunity for future exposure. In a climate where the time between vulnerability and exploit continues to shrink network anomaly detection is proving to be a critical element of defense-in-depth. For more information, security experts from Mazu Networks are available to comment on Zotob, future worm variants, the state of the internal network, shortcomings of traditional security measures that led to the success of Zotob, among other relevant security topics. Several of Mazu Networks' customers are also available for comment on their personal account of the Zotob worm outbreak and how they successfully defeated the attack.

About Mazu Networks, Inc.

Mazu Networks is the leader in behavior-based, network security solutions. The company's technology analyzes network traffic and behavior to help enterprises operate networks more securely. Mazu has two products. The Mazu Profiler is an internal security solution designed to detect and mitigate worms and internal threats. The Mazu Enforcer is a perimeter security solution designed to detect and mitigate denial-of-service attacks. Mazu Networks is backed by premier venture capital firms, including Greylock, Matrix Partners, Pilot House Ventures Group and StarVest Partners. Symantec Corporation also is an investor in the company. Mazu is an IBM Business Partner. Headquartered in Cambridge, Mass., Mazu also has locations in New York, San Francisco and Washington, D.C. For more information, please visit www.mazunetworks.com.