Sourcefire Positioned in the Leaders Quadrant of Network Intrusion Prevention Magic Quadrant Report.

Evaluation Based on Completeness of Vision and Ability to Execute

COLUMBIA, Md. -- Open source innovator and Snort([R]) creator, Sourcefire, Inc., a leader in network intrusion prevention, today announced that Gartner, Inc. has positioned the company in the Leaders Quadrant of the "Magic Quadrant for Network Intrusion Prevention System Appliances, 2H06"1 report. The Magic Quadrant evaluates vendors based on their vision and ability to execute and positions them in one of the following quadrants: Leaders, Visionaries, Challengers or Niche Players.

"Sourcefire is proud to be positioned in the Leaders Quadrant of the Network Intrusion Prevention Report," said Wayne Jackson, CEO of Sourcefire. "Sourcefire's goal has always been to deliver innovative solutions to the complex, real-world issues facing our customers. We feel that our position in the Leaders Quadrant validates this mission, along with the significant value we consistently deliver to our customers."

According to Gartner, Leaders demonstrate balanced progress and effort on all execution and vision categories. Their actions raise the competitive bar for all products in the market, and they can change the course of the industry. To remain in the Leaders quadrant, these vendors must have demonstrated a track record of delivering successfully in enterprise IPS deployments and winning in competitive assessments. Leaders produce products that provide high signature quality, offer low latency, are innovating with or ahead of customer challenges (such as using endpoint intelligence to make more-efficient detection), and have a range of models. Leaders consistently win selections and have been consistently visible on enterprise shortlists.

Sourcefire has been consistently recognized for its innovation and industry leadership by customers, media, and industry analysts alike - with more than 18 awards and accolades since January 2005. In 2006, the Sourcefire[R] 3D System[TM] was named the "Best Security Solution" at the 2006 SC Awards and was awarded "Security Product of the Year" at the NetEvents 2006 "Technology Leader" Awards.

Magic Quadrant Disclaimer

The Magic Quadrant is copyrighted December 22, 2006 by Gartner, Inc. and is reused with permission. The Magic Quadrant is a graphical representation of a marketplace at and for a specific time period. It depicts Gartner's analysis of how certain vendors measure against criteria for that marketplace, as defined by Gartner. Gartner does not endorse any vendor, product or service depicted in the Magic Quadrant, and does not advise technology users to select only those vendors placed in the "Leaders" quadrant. The Magic Quadrant is intended solely as a research tool, and is not meant to be a specific guide to action. Gartner disclaims all warranties, express or implied, with respect to this research, including any warranties of merchantability or fitness for a particular purpose.

About Sourcefire

Sourcefire, Inc., a leading provider of intelligence driven, open source network security 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 network defense system unifies intrusion and vulnerability management technologies to provide customers with superior network security. Founded in 2001 by the creator of Snort, Sourcefire is headquartered in Columbia, MD. 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, visit www.sourcefire.com.

1 Gartner Research "Magic Quadrant for Network Intrusion Prevention System Appliances, 2H06"by Greg Young and John Pescatore. December 22, 2006