SOURCEFIRE NAMED MOST INNOVATIVE COMPANY AT ANNUAL RSA SECURITY CONFERENCE

Real-time Network Awareness Technology & Multi-Gigabit IPS Drive Recognition of Sourcefire Advances in Real-time Network Security

Columbia, MD, March 1, 2005 - Sourcefire, Inc., the world leader in real-time network defense, today announced that it has been named the most innovative company at the RSA (Nasdaq: RSAS) Conference by a panel of independent judges representing some of the leading venture capital firms in the Information Security industry.  As an exhibitor in RSA’s first annual invitation-only Innovation Station, Sourcefire competed against more than 45 other vendors to receive this top honor.

“RSA is the security industry’s leading trade show and to be chosen as the most innovative company in that setting, where all of the vendors are displaying their latest and greatest technology, is a tremendous validation of Sourcefire’s commitment to advanced research and development,” said Wayne Jackson, CEO of Sourcefire.  “We are, perhaps, even more proud that enterprise customers continue to validate our solutions and drive Sourcefire’s growth as the largest privately held Intrusion Prevention vendor in the industry.”

Sourcefire has a long history of innovation – starting with the creation of the open source technology Snort®, the de facto standard for intrusion detection and prevention which has been downloaded more than 2 million times and is actively used by over 100,000 organizations worldwide. Most recently, Sourcefire announced the IS5800, the industry’s first 8 gigabit IPS appliance. With extreme flexibility, long a Sourcefire hallmark, the IS5800 Series can be deployed in an array of configurations to suit nearly any network requirement and combination of mission-critical applications, including latency sensitive applications like Voice Over IP (VoIP). Sourcefire’s award-winning Intrusion Sensors feature comprehensive protection against enterprise threats such as worms, viruses and spyware.

In late 2003, Sourcefire released its Real-time Network Awareness (RNA) product, the first solution to use passive, sonar-like, techniques to build a highly detailed profile of the network and network assets including potential points of vulnerability. Because RNA is constantly monitoring the network, RNA also detects changes in real-time including the introduction of new network assets or services, new behaviors or anomalous traffic patterns. This unprecedented level of detail enables the automation of otherwise labor intensive, intermittent processes such as threat analysis, patch management, vulnerability management and network policy enforcement.

In addition to the RSA Innovator honor, Sourcefire was recently named the 2005 Network Security Company of the Year by Frost & Sullivan and the Best Intrusion Solution at the Global SC Awards.   In 2004, the company was also named the #2 Rising Star in the nation on the Deloitte Technology Fast 500, a ranking of the fastest growing technology companies in North America.  The company was also named to the 2004 Red Herring 100 Top Private Companies, based on its technology leadership and strong financial outlook and was named to the AlwaysOn AO100, which awarded the company’s market traction and the ability to disrupt existing markets.

About Sourcefire’s 3D System
Sourcefire’s 3D Approach – Discover, Determine, Defend – to securing real networks in real-time provides proactive defense-in-depth through an integrated process of discovering risks, vulnerabilities and threats; determining their business impact ;and taking the appropriate action to defend the network. Sourcefire’s 3D System, including Sourcefire Intrusion Sensors and Agents, Sourcefire RNA Sensors and the Sourcefire Defense Center, provides companies with the most effective security possible.

The Sourcefire 3D System offers the most flexible and precise intrusion detection and network discovery technologies worldwide.  Sourcefire Intrusion Sensors utilize the award-winning Snort™ rules-based detection engine, bringing the benefits of signature, protocol, and anomaly-based inspection methods to all varying network traffic speeds.  In addition, Sourcefire RNA Sensors passively monitor a network to deliver highly detailed, real-time profiles of all network assets including their configuration, behavior, potential vulnerabilities and associated changes.  By tightly integrating and correlating the threat information provided by Sourcefire Intrusion Sensors and Agents with the network intelligence provided by Sourcefire RNA Sensors, the Sourcefire Defense Center easily prioritizes the millions of security events to determine the most critical events to an organization’s business and takes the appropriate actions.  These actions follow the ABCs of Defense – Alert, Block, Correct – all in real-time to deliver the most effective security.

About Sourcefire
Sourcefire, Inc., the world leader in real-time network defense solutions, is transforming the way organizations manage and minimize network security risks with its 3D Approach - Discover, Determine, Defend - to securing real networks in real-time. The company's ground-breaking network defense system unifies intrusion and vulnerability management technologies to provide customers with the most effective network security available. Founded in 2001 by the creator of Snort, Sourcefire is headquartered in Columbia, MD and has received numerous accolades including being named the Frost & Sullivan 2005 Network Security Infrastructure Protection Company of the Year. At work in leading Fortune 1000 and government agencies, the names Sourcefire and founder Martin Roesch have grown synonymous with innovation and intelligence in network security. For more information about Sourcefire, please visit www.sourcefire.com.