Internet Security Systems Enhances Protection Platform with E-mail Security Appliance

Internet Security Systems, Inc. (ISS) (NASDAQ: ISSX),
the worldwide leader in preemptive, enterprise security, today
introduced the Proventia(R) Network Mail Security System, the
company's first security appliance dedicated solely to protecting an
organization's messaging infrastructure. Unlike existing e-mail
security solutions that tend to focus only on anti-spam technology,
the new ISS solution offers comprehensive, preemptive protection
against messaging threats through industry-leading intrusion
prevention system (IPS) technology and the patented ISS Virus
Prevention System (VPS).
   Proventia Network Mail is an extension of the ISS protection
platform, which provides end-to-end protection against threats to
enterprise endpoints, servers, networks and gateways. Designed for
enterprises and managed service providers, the Proventia Network Mail
appliance scales to support the demands of large organizations. It can
be configured to protect as few as 2,500 users or up to hundreds of
thousands of users with minimal appliance deployments.
   In the era of distributed workforces, virtual teams, road warriors
and corporate globalization, e-mail is the most indispensable
enterprise application, yet it continues to be plagued not only by
spam but also by phishing, denial of service attacks, directory
harvest attacks, viruses, worms and other types of malicious code.
   According to Brian Burke of IDC, "Organizations are increasingly
buying messaging security solutions that address multiple threats and
deliver integrated antivirus, anti-spam and content filtering in a
single solution. Security appliances are quickly becoming the platform
of choice for integrating multiple messaging security
technologies."(1)
   "With organizations expecting greater functionality from their
e-mail security solutions, ISS is well positioned to offer a dedicated
e-mail security appliance to the market," said Greg Adams, vice
president of product development at Internet Security Systems.
"Through the ISS protection platform, ISS leverages its core
technologies to provide customers with the simplest, most effective
means of protecting critical IT infrastructure from networks to
desktops and servers. Since e-mail servers have now become a main
entry point into a network for attackers, we are extending our
industry-leading IPS technology and unique Virus Prevention System to
protect companies' messaging architecture."
   Through a powerful combination of IPS, virus blocking, anti-spam
and embedded URL filtering technologies, Proventia Network Mail
protects against spam and the full realm of malicious code affecting
e-mail systems through the SMTP protocol, including phishing attacks,
viruses, worms and other malcode. The appliance inspects the content
of each e-mail that enters an organization at multiple levels,
ensuring 98 percent effectiveness in spam blocking. It is the only
solution on the market that includes the unique Virus Prevention
System technology from ISS, which assesses the behavior of network
traffic, including e-mail attachments and files, to identify and block
viruses and other zero-day threats before they are even discovered,
preventing malicious content from ever reaching the download stage.
   "The addition of e-mail content security to the ISS portfolio will
further increase the value of the company's protection platform," said
Eugenie Toecker, Messaging Administrator at German research center,
FZK. "While it is widely estimated that 80 to 90 percent of the
world's incoming e-mail traffic is spam, companies are recognizing
that anti-spam technology alone is not enough to prevent their
messaging infrastructures from being shut down by attackers, used to
infiltrate other parts of the network or even harvested for users'
personal information. We are confident that ISS' proven IPS and VPS
technologies will significantly help companies like ours to regain
control of our messaging infrastructure."
   "Our company has always been met with great success in bringing
the ISS protection platform and its various products to market," said
Brandy Peterson, CTO at FishNet Security. "We are pleased that we can
now offer customers a dedicated solution for email security based on
the high-caliber ISS technologies they rely on to protect their other
network assets."
   ISS technology is backed by the world-renowned ISS X-Force(R)
research and development team. Consistently rivaling independent
researchers and other security vendors with cutting-edge findings, the
X-Force discovered 51 percent of the high-risk vulnerabilities found
by commercial security research groups from 1998 to 2005.
   Additionally, ISS intrusion prevention solutions are bolstered by
the company's unique Virtual Patch(R) technology. By shielding the
underlying vulnerability instead of focusing on each new exploit,
Virtual Patch provides protection even before a vendor-supplied patch
is available. Enterprises can then make their own decisions about when
to schedule patching, while the messaging infrastructure remains
secure from costly security breaches.
   Through the Proventia Management SiteProtector(TM), Proventia
Network Mail becomes an integrated part of the ISS protection
platform, along with other ISS products and valuable security
intelligence and services from ISS. Through this layered approach with
central management capabilities, organizations can protect their
assets more efficiently and dramatically reduce security costs.
   Proventia Network Mail will be available this month both directly
from ISS and through channel partners. Optional signature-based
antivirus capabilities are also available for this appliance.
   Further information on the Proventia Network Mail Security System
can be found at:
http://www.iss.net/products/Proventia_Mail_Appliance/
product_main_page.html (Due to its length, this URL may need to be 
copied/pasted into your Internet browser's address field. Remove
the extra space if one exists.)

   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 e-mail security offerings 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 and SiteProtector are trademarks and
Proventia, Virtual Patch 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) IDC, "Worldwide Secure Content Management 2006-2010 Forecast:
The Rise and Fall of SCM," March 2006, Brian Burke