Internet Security Systems Forms Alliance with BitDefender To Expand Desktop Protection; ISS Will Add BitDefender's Antivirus an

Internet Security Systems, Inc. (ISS) (NASDAQ: ISSX),
the worldwide leader in preemptive, enterprise security, today
announced an alliance with BitDefender(R), an award-winning provider
of antivirus software and data security solutions, to integrate new
antivirus and anti-spyware features into the ISS Proventia(R) Desktop
Endpoint Security product. The new features will complement the
patented, behavioral-based ISS Virus Prevention System (VPS), already
a key component of the company's desktop protection offering.
   "Our unique VPS technology provides unprecedented protection
against unknown zero-day malcode by recognizing malicious behavior and
blocking it accordingly," said Greg Adams, Vice President, Product
Development at Internet Security Systems. "While behavioral-based
technologies such as VPS are extremely powerful for stopping unknown
threats, ISS recognizes that organizations also use antivirus and
anti-spyware solutions for scanning and removing known malware. By
integrating BitDefender's antivirus and anti-spyware capabilities into
our desktop product, we are offering our customers a comprehensive
solution for handling both known exploits and unidentified malware."
   "Virus writers, scam artists and crooked online marketers are
becoming increasingly adept at getting around some of the mainstream
security software applications offered in the market," commented Eric
Lewis, BitDefender's Managing Director, North America. "BitDefender's
proven antivirus and anti-spyware solutions offer ISS customers new
layers of security that the more established brands simply can't
match."
   "We are confident that the addition of these new capabilities will
help increase our sales of ISS Proventia Desktop," said Jared Hornsby,
executive vice president at Future Com, Ltd., an ISS partner
organization. "With the growing complexity of today's security
landscape and the exponential growth of new online threats, our
customers continue to seek the simplest, most cost-effective solutions
to their problems. The concept of having comprehensive, multi-layered
security technologies together in one agent will indeed appeal to many
of them."
   According to Gartner's Neil MacDonald, "No single style of
host-based intrusion prevention provides sufficient protection. By
using multiple styles of protection, you can create, overall, a more
effective host-based intrusion prevention system strategy appropriate
to your needs."(1)
   ISS Proventia Desktop with integrated antivirus and anti-spyware
features will be available early 2007. Antivirus and anti-spyware
content updates will be made available via annual subscription.
   Further information on the ISS Proventia Desktop product can be
found at: http://www.iss.net/products/Proventia_Desktop/index.html

   About BitDefender(R)

   BitDefender is a leading global provider of security solutions
that satisfy the protection requirements of today's computing
environment. The company offers one of the industry's fastest and most
effective lines of security software, setting new standards for threat
prevention, timely detection and mitigation. BitDefender delivers
products and services to over 41 million home and corporate users in
more than 100 countries. BitDefender has offices in the United States,
the United Kingdom, Germany, Spain and Romania. Further information
about BitDefender can be obtained by visiting:
http://www.bitdefender.com.

   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, the ISS
Proventia(R) 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. The ISS product line is also complemented by comprehensive
Managed Security Services and Professional 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 desktop protection features not yet released. The risks and
uncertainties which could cause actual results to differ materially
from those in the forward-looking statements include, but are not
limited to, the following: the level of demand for ISS products;
product and price competition; the extent to which unauthorized access
to and use of online information is perceived as a threat to network
security; customer budgets; risks concerning the rapid change of
technology; and general economic factors. These risks and others 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 Proventia and X-Force
are registered trademarks of Internet Security Systems, Inc. All other
companies and products mentioned are trademarks and property of their
respective owners.
   1 - Gartner, "Understanding Strengths and Weaknesses of Host-Based
Intrusion Prevention Styles," January 30, 2006, Neil MacDonald