Internet Security Systems Schedules Second Quarter 2006 Earnings Call

Internet Security Systems, Inc. (ISS) (NASDAQ: ISSX),
the worldwide leader in preemptive, enterprise security, today
announced the intent to release financial results on Monday, July 31,
2006 for the quarterly period ended June 30, 2006. The release will be
issued after the stock market close at approximately 4 p.m. Eastern
Time (ET).
   A conference call led by Thomas Noonan, ISS chairman, president
and chief executive officer, and Raghavan (Raj) Rajaji, ISS chief
financial officer, will be held at 4:30 p.m. ET on July 31, 2006
following the announcement.
   Details of the conference call are as follows:
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DATE/TIME:                     Monday, July 31, 2006 at 4:30 p.m. ET

DIAL IN:                       Domestic          800-665-0430
                               International     [phone]
                               Pass code           6641537

   A live Webcast of this conference call will be available at
www.iss.net and the archived Webcast will remain accessible on the ISS
Web site for one year. An audio rebroadcast of the teleconference will
be available until August 1, 2006.

REBROADCAST DIAL IN:           Domestic            888-203-1112
                               International     [phone]
                               Pass code         6641537
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   Additional investor information can be accessed on the Internet
Security Systems Web site or by contacting the Investor Relations
department at [phone].

   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
and Professional 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 X-Force is a
registered trademark of Internet Security Systems, Inc.