Internet Security Systems Develops Prototype for Switch-Enabled Intrusion Prevention; Effort Focused on Moving Preemptive Security to the Core of Enterprise Networks

Business Wire, May 2, 2006

LAS VEGAS -- Internet Security Systems, Inc. (ISS) (NASDAQ: ISSX), the worldwide leader in preemptive, enterprise security, today announced that it has developed a working prototype for switch-enabled intrusion prevention system (SWIPS) technology. By teaming with global network infrastructure provider Extreme Networks, Inc., ISS has demonstrated the possibility and value of implementing intrusion prevention system (IPS) technology at the network switch level.

Bringing IPS to the core of the network provides another layer of protection for traffic flowing through a corporate network, without requiring any changes to the network's overall configuration. This highly scalable method of delivering IPS functionality provides large organizations cost-effective security capable of protecting a broad range of network assets, with little to no impact on the speed of network traffic. Successful collaboration between ISS and Extreme Networks will result in intrusion prevention that can scale at core speeds, up to 100 Gigabits.

"Organizations are beginning to recognize the value of making security an integral part of their network fabric," said Chris Rouland, chief technology officer at Internet Security Systems. "ISS is therefore leading research and development efforts within the security industry to quickly and effectively address the additional needs that go along with this market shift. In order to operate efficiently at the core of the network, security technology must scale to analyze high volumes of traffic as fast as the networking components can transmit it."

SWIPS will serve as a key component of ISS' Proventia(R) protection platform. By offering comprehensive, integrated protection for networks, desktops and servers, ISS empowers companies to focus more heavily on day-to-day business objectives instead of worrying about security.

"ISS has been an ideal company to work with Extreme Networks in delivering scalable, switch-enabled intrusion prevention within the network," said Herb Schneider, senior vice president of research and development at Extreme Networks. "ISS is taking an innovative approach to network protection, driven by its X-Force(R) research and development team. This complements our open approach to security, allowing us to provide our customers with a more automated means of shielding IT assets from attacks before they occur."

As part of the "Powered By ISS" program also announced today, ISS will continue to work with Extreme Networks and other network infrastructure providers to make switch-enabled IPS solutions broadly available to customers. ISS continues to develop inline solutions that increase the scalability of IPS technology to more closely align with other network components. For further details on SWIPS, please visit Interop Booth #739 or go to: www.iss.net/interop2006.> About Internet Security Systems, Inc.

Internet Security Systems, Inc. (ISS) is the trusted security advisor to thousands of the world's leading businesses and governments, providing preemptive protection for networks, desktops and servers. An established leader in security since 1994, ISS' integrated security platform automatically protects against both known and unknown threats, keeping networks up and running and shielding customers from online attacks before they impact business assets. ISS products and services are based on the proactive security intelligence of its X-Force(R) research and development team - the unequivocal world authority in vulnerability and threat research. ISS' product line is also complemented by comprehensive Managed Security Services. For more information, visit the Internet Security Systems Web site at www.iss.net or call 800-776-2362.

This release, other than historical information, includes forward-looking statements made pursuant to the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. Some of these forward-looking statements include those describing future switch-enabled intrusion prevention systems and other intrusion prevention offerings not yet released. The risks and uncertainties which could cause actual results to differ materially from those in the forward-looking statements are discussed in ISS' periodic filings with the Securities and Exchange Commission. These filings can be obtained either by contacting ISS Investor Relations or through the Securities and Exchange Commission's Web site at http://www.sec.gov.

Internet Security Systems is a trademark and X-Force and Proventia are registered trademarks of Internet Security Systems, Inc. All other companies and products mentioned are trademarks and property of their respective owners.