Press Release - For Immediate Release

Radicati Ranks IronPort Systems #1 for Market Share in Latest Study

SAN BRUNO, Calif. - Dec. 19 2007 -- IronPort® Systems, a Cisco business unit and a leading provider of enterprise spam, virus and spyware protection, today announced that Radicati, a leading technology research firm, has named IronPort the market share leader in the email security appliance market. Radaciti specifically highlighted the IronPort C-Series Appliance as a top player and recognized the Company for providing high performance that meets the throughput needs of large-sized enterprises and for utilizing its pioneering reputation system, the SenderBase® network, in stopping spam and protecting enterprises from security threats.

"IronPort's top position in the market quadrant reinforces what our customers already know - having a world-class email appliance on their network is a critical element in stopping spam and protecting against the myriad of threats that come across messaging channels," said Tom Gillis, vice president of marketing for IronPort. "Validated by our number one market share position, our placement in the Top Players quadrant further recognizes our efforts and commitment to provide our customers with the most complete enterprise spam, virus and spyware protection on the market today."

Radicati Market Quadrants rank vendors based on a four-quadrant system, which includes "Mature Players," "Specialists," "Trail Blazers," and "Top Players" quadrants. Leading players in each market segment are ranked based on the features and functionality of their solution and their market share in that segment. Radicati Market Quadrants provide a comparative viewpoint of the market, and an analysis of each vendor included in the study, including both strengths and weaknesses.

About IronPort Systems

IronPort Systems, headquartered in San Bruno, California, is a business unit of Cisco Systems, Inc.. IronPort is the leading provider of anti-spam, anti-virus and anti-spyware appliances for organizations ranging from small businesses to the Global 2000. IronPort appliances utilize SenderBase®, the world's largest email and Web threat detection network and database. IronPort products are innovative and easy-to-use - providing breakthrough performance and playing a mission-critical role in a company's network infrastructure. To learn more about IronPort products and services, please visit: http://www.ironport.com/.

Copyright © 2007 Cisco IronPort Systems, LLC All rights reserved. IronPort, the IronPort logo and SenderBase are registered trademarks of Cisco IronPort Systems, LLC. All other trademarks are the property of Cisco IronPort Systems, LLC or their respective owners. While every effort is made to ensure the information given is accurate, IronPort does not accept liability for any errors or mistakes which may arise. Specifications and other information in this document may be subject to change without notice.

Press / Analysts

If you are a reporter or analyst and want more information on IronPort Systems please contact:

Liz Landis
IronPort Systems
415.828.4801
llandis@ironport.com

David Oro
The Oro Group
707.558.8585
david@orogroup.com

Suzanne Matick
IronPort Systems
831.479.1888
smatick@ironport.com