ISSX Internet Security Systems

Internet Security Systems, Inc. (ISS) (NASDAQ: ISSX), the worldwide leader in preemptive, enterprise security, will hold its annual Analyst Day on Thursday, May 4, 2006 in Las Vegas. The event will include presentations from Thomas Noonan, chairman, president and chief executive officer; Peter Evans, vice president of marketing; Greg Adams, vice president of product management; Chris Rouland, chief technology officer; Raghavan (Raj) Rajaji, chief financial officer; and Larry Costanza, senior vice president of Americas sales. The presentations will outline key strategies for continued financial growth and product innovation. In addition, attendees will have access to product demonstrations and a partner and customer panel that will capture implementations and best practices of the ISS Proventia(R) protection platform. For more information, or to register, please visit the ISS Analyst Day section of the company's Web site at: http://www.iss.net/about/events/analystday2006/ or contact the investor relations department at 404-236-4053. For those who are unable to attend, a live Webcast and a replay of the 2006 Analyst Day presentations will be available on the ISS Web site at http://www.iss.net/ beginning at 1:45 p.m. PT on May 4. 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. Internet Security Systems is a trademark and Proventia is a registered trademark of Internet Security Systems, Inc.