SC MAGAZINE DECLARES SOURCEFIRE^® BEST IPS PRODUCT IN INDEPENDENT TEST OF 12 LEADING VENDORS

Sourcefire Leads All Major IPS Vendors Including ISS, McAfee, Symantec, Tipping Point, and Top Layer

Columbia, MD, July 11, 2005 - Sourcefire, Inc., the world leader in intrusion prevention, today announced that the Sourcefire IS 2000 won the “Best Buy” award in a comparative test of the 12 leading Intrusion Prevention Systems, appearing in the July issue of SC Magazine (www.scmagazine.com). In a Group Test that included Barbedwire Technologies, Countersnipe, ISS (Nasdaq: ISSX), McAfee (NYSE: MFE), NFR, SonicWall (Nasdaq: SNWL), Symantec (Nasdaq: SYMC), Top Layer, Tipping Point (Nasdaq: COMS), V-Secure and XSGuard, Sourcefire received 5 stars in all categories, leading the editors to state “Sourcefire 3D System: Best IPS out there on the market.”

“In the last three weeks, Sourcefire was identified as the fastest growing IPS vendor by Infonetics, named one of the top 100 private technology companies by AlwaysOn, and now our technology leadership has been unequivocally validated by one of the world’s leading testing organizations,” said Martin Roesch, Founder and CTO of Sourcefire. “This review further validates Sourcefire’s technology leadership, by comparing us to every other major vendor in this marketplace. I am very proud of this success and the hard work that has gone into getting Sourcefire to this point.”

In awarding the Sourcefire IS 2000 the Best Buy award, the SC Magazine editors write: “Its high level of protection and simple rule writing using the Snort engine make it a good standalone product. But it is when it is used as part of the 3D System that it really takes off. Sourcefire’s Defense Center provides excellent centralized management and reporting, and its Real-time Network analysis appliance gives a wider look at the network to help secure it.”

The review goes on to state: “Sourcefire's 3D System is by far the most comprehensive product on test. Its multi-pronged approach gives it a clear detection and threat neutralization advantage… for large networks, the array of detection sensors, excellent centralized management and effective threat prevention makes this a powerful system.”

To view the entire review, go to: http://www.scmagazine.com/products/index.cfm?fuseaction=productDetails&productID=19112&type=review

The Sourcefire 3D System offers the most flexible and precise intrusion prevention and network discovery technologies worldwide. 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.

In June Sourcefire was identified as the fastest growing IPS vendor by leading analyst firm, Infonetics, and was also named to the AlwaysOn 100 for the second consecutive year, recognizing the company’s market momentum and innovation. Earlier this year, Frost and Sullivan awarded Sourcefire its “Security Company of the Year” and the company was named the Most Innovative Company at the RSA Conference. In addition, the Sourcefire 3D System received “NSS Approved” certification in March, and in April Sourcefire RNA became only the fifth product in history to receive “NSS Gold” for its unique ability to solve customers’ security issues.

About Sourcefire
Sourcefire, Inc., the world leader in intrusion prevention, 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.