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Advanced Features Address the Growing Number of Sophisticated and Complex DoS Attacks Targeted at Enterprise Resources for Financial Gain

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Cambridge, Mass. (June 6, 2005) - Mazu Networks, the leading provider of enterprise-class behavior-based network security solutions, today announced Mazu Enforcer™ version 6.0 to provide increased protection for critical systems against denial-of-service (DoS) attacks. Mazu Enforcer, a perimeter appliance that monitors network traffic to identify threats such as DoS attacks, boasts key technology updates in Mazu Enforcer version 6.0 including anti-spoofing, advanced auto-mitigation and inline-on-demand capabilities. Through these new defense capabilities, Mazu Networks will provide enterprises with more control over their security posture, thereby enabling them to defeat complex resource attacks.

"With high tech criminals becoming more organized and sophisticated, the motivation for their attacks has matured from infamy within their illicit circles to achieving financial gain through tactics such as DoS extortion threats," said Paul Brady, CEO, Mazu Networks, Inc. "This new breed of criminal uses DoS attacks to target critical corporate resources versus simply slowing business operations by flooding a company's network with attack traffic. Although carriers can help companies protect against the latter, they fall short when it comes to defending against complex DoS attacks. For a company to effectively contend with these growing security concerns, a layer of protection must be added at the enterprise level. Mazu Enforcer provides that critical layer."

The feature upgrades to Mazu Enforcer version 6.0 address critical customer issues such as: protecting against the increase and sophistication of DoS attacks; minimizing the number of inline devices on the network and the need for more automated capabilities with the ability to conditionally control the technology when needed. Responding to customer demand, Mazu Networks added the following key features to Mazu Enforcer version 6.0:

• Advanced Auto-Mitigation: The advanced auto-mitigation feature minimizes a company's involvement with most attacks by automatically addressing malicious activity. Further, Mazu Enforcer enables companies to control the mitigation feature for potentially complicated attacks.
• Inline-on-Demand: The inline-on-demand functionality allows Mazu Enforcer to operate passively under normal conditions and inline during an attack. When under attack, Mazu Enforcer will redirect traffic destined for the victim through an active probe to filter traffic.
• Anti-Spoofing: The anti-spoofing feature adds an accurate and effective security layer to Mazu Enforcer's DoS defense capabilities. This enables companies to detect and block spoofed source address which will allow them to effectively combat increasingly sophisticated and complex attacks targeted at enterprise resources.

Mazu Enforcer is designed to detect, characterize and surgically mitigate network attacks with speed and precision. As a perimeter appliance, Mazu Enforcer watches for network congestion caused by DoS attacks. When Mazu Enforcer detects an attack, it uses advanced heuristics to quickly identify the individual packets causing the problem. The technology then filters out the malicious activity while minimizing the impact on legitimate traffic. Mazu Enforcer can also dynamically adapt its filtering behavior as an attack progresses. Mazu Enforcer allows security and network operations teams to: regain and retain control during attacks; maintain full availability of network resources and reduce the cost, time and effort associated with protecting their critical assets from sophisticated and complex DoS attacks.

Mazu Enforcer combined with Mazu Profiler™, a solution for securing the internal network against worm outbreaks and insider threats, provide two key layers of a defense-in-depth security strategy. For a company to effectively contend with the growing number, increased sophistication and varied types of attacks, it is imperative to establish safeguards both at the interior and at the perimeter of the network.

Availability

Mazu Enforcer version 6.0 is currently available through the Mazu Networks sales channels. For more information on the product visit:http://www.mazunetworks.com/enforcer/.

About Mazu Networks, Inc.

Mazu Networks is a behavior-based, network security company with solutions that analyze 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.