Company Timeline

From humble Atlanta beginnings to trusted security expert serving global enterprises and world governments, Internet Security Systems (ISS) has been protecting customers from Internet threats for a decade. This timeline documents some of the most significant milestones during this 10-year journey.

Learn what ISS was doing in the year:


During a high school internship at the U.S. Department of Energy, Christopher Klaus begins work on inventing a groundbreaking technology that will actively identify and correct network security weaknesses.

Upon release, the product becomes known as Internet Security Systems' flagship Internet Scanner software application. The availability of this product creates the category of vulnerability assessment.


At the age of 19, Klaus attends the Georgia Institute of Technology and releases Internet Security Scanner as freeware on the Internet.


Klaus marks the first sale of Internet Security Scanner 1.0.


Klaus founds Internet Security Systems (ISS) and begins selling Internet Scanner. His "company" is initially based in his grandmother's home.


Tom Noonan joins ISS as the company's president and the company moves into its first office in Norcross GA.


Internet Security Systems receives its first round of venture capital in February, totaling $3.6 million.

ISS' RealSecure solution, the industry's first integrated network intrusion detection and response system is made generally available.

The X-Force security intelligence team is born - a group of security experts who become world renowned for proactive research on security flaws in software and the techniques hackers use to attack networks.

March of 1996 marks the opening of ISS' European headquarters in Belgium.


Adding to the successful Internet Scanner product line, ISS expands its security assessment offering to include host systems. The System Scanner application is announced, the first of its kind to assess host security and detect and report system security weaknesses.

The company receives its second round of venture capital, totaling $5.2 million.

ISS KK, Internet Security Systems' Asia-Pacific subsidiary, opens in Japan.

ISS opens offices in the UK and France.


ISS forms the X-Force Professional Services and Training Organization, building a world renowned services organization and training center for security experts.

The Database Scanner application is announced, providing total security for database management systems and exposing vulnerabilities detected in distributed enterprise databases.

ISS expands its global presence with the opening of additional offices in Brazil and Germany.

ISS completes a successful IPO on March 24 at an offering price of $22 per share (pre-split). The stock closes that day at $40 per share.

ISS acquires March Systems, LTD, a UK-based provider of security products and services.


SAFEsuite Decisions is announced, the industry's first enterprise security information management and decision support application.

Internet Security Systems acquires Netrex Secure Solutions, reinforcing ISS' position as the leading provider of security management solutions.

ISS opens offices in Holland and Sweden.


The Information Technology Information Sharing and Analysis Center (IT-ISAC) is formed and announces ISS as its security provider.

ISS opens its Barfield Road, Atlanta headquarters on December 4th

ISS offices are opened in Italy, Poland, Switzerland and the Middle East.


The Wireless Scanner application, the first wireless security assessment solution is unveiled.

In January, ISS opens its Australia office. The company continues its expansion later that year with offices opened in the Netherlands, Spain, Mexico, Korea and the Philippines.

The industry's first pervasive protection platform, the RealSecure Protection System, is released by ISS. The protection platform converges intrusion detection, security assessment, active blocking and malicious code protection capabilities into one centrally managed system.

ISS opens the Global Threat Operations Center (GTOC) at its Atlanta headquarters. The GTOC collects and analyzes security data and trends derived from ISS' Security Operations Centers and network sensors around the globe.

ISS introduces the AlertCon rating system - the first Website indicator designed to measure the level of threat to online assets at a certain point in time. The GTOC sets the AlertCon rating based on data collected from five continents.

ISS acquires NetworkICE, enhancing the company's information protection solutions to actively detect and prevent security risks at every potential point of compromise. BlackICE PC Protection is introduced under the ISS umbrella, providing enterprise-strength security for small office and home users.

On September 4, 2001, ISS KK stock begins trading on the Tokyo Stock Exchange in Japan.


ISS announces Managed Intrusion Protection Service (MIPS) for networks that provide unobtrusive, around-the-clock network monitoring by ISS security experts to protect against attacks or misuse.

ISS announces the RealSecure SiteProtector system, the first centralized enterprise management system enabling customers to control, monitor and analyze enterprise-wide threats from one central source.

RealSecure Desktop Protector hits the market, performing real-time protection against malicious activity by analyzing application and network (including VPN) behavior on desktops.

The X-Force records the 10,000th vulnerability in its research database since the group's inception in 1996.

RealSecure Guard becomes the first in-line protection technology, ushering in the age of intrusion prevention.

ISS releases vulnerability disclosure guidelines outlining the processes and procedures under which vulnerabilities that are researched and discovered by the X-Force are disclosed to software and hardware vendors, customers and the public.

ISS acquires vCIS Inc., a developer of preemptive behavioral inspection technology. The acquisition continues the company's focus on preventing malicious code from executing and causing damage before it impacts the enterprise network.

ISS opens offices in Singapore.


The X-Force discovers a major vulnerability in the most widely used e-mail server software, Sendmail.

ISS discovers, names and tracks the SQL Slammer Worm, which hit the Internet in the early hours of January 24, 2003, as the fastest hybrid attack ever, infecting more than 90 percent of vulnerable servers within the first 15 minutes of release.

Internet Security Systems introduces Proventia integrated security appliances, combining multiple security technologies into a single, easy-to-manage device.


Internet Security Systems becomes a founding member of the Cyber Security Industry Alliance (CSIA), a non-profit, corporate-membership organization whose mission is to improve cyber security through public policy initiatives, public sector partnerships, corporate outreach, academic programs, alignment behind emerging industry technology standards and public education. (February)

ISS acquires German content security pioneer Cobion. Soon after the acquisition, the Proventia Web Filter, a content filtering solution for Web gateways, and Proventia Mail Filter, a mail security solution for e-mail gateways were unveiled.

The company continues its expansion with offices opening in India and Beijing.

ISS' Web filtering technology identifies and stores the one-billionth Internet image, an online rendering of the painting "Doris in Red" by artist Liz Bayerlein of Bernkastel-Keus, Germany.

Internet Security Systems launches the Proventia Enterprise Security Platform (ESP), the industry's only preemptive enterprise security platform. By delivering its products and services through an easily adaptable platform, ISS is able to align security more closely with other business processes. (October)

More than 1,200 people in 20 countries, serving over 12,000 organizations worldwide are part of the Internet Security Systems family. The company celebrates its ten year anniversary and nine consecutive years of financial growth.


Internet Security Systems launches Proventia Desktop with Virus Prevention System (VPS) technology. Proventia Desktop is designed to meet the needs of enterprise customers with mobile workforces in which assets routinely travel outside of the organization's network security umbrella. The product integrates key security features including firewall protection, intrusion prevention, VPN security, granular application control, Buffer Overflow Exploit Prevention (BOEP), application control, anti-spyware measures and the unique behavioral-based VPS technology.

Internet Security Systems X-Force discovers a vulnerability in the Microsoft Windows Plug and Play Service that is eventually exploited by the Zotob worm. ISS Virtual Patch technology protects customers from the Zotob worm four months before the attack even becomes public.  

ISS becomes the first enterprise security company certified under the J.D. Power and Associates Certified Technology Service and Support Program.

ISS Managed Security Services launches its new Vulnerability Management Service (VMS) to help organizations of all sizes assess their security posture and effectively reduce risks. Through this turn-key solution, organizations not only reduce exposure to worms and other high-risk issues that can have a severe impact on business operations, but can also significantly lower their security costs, reduce burdens on in-house IT staff and maintain compliance with regulatory guidelines such as Sarbanes-Oxley and HIPAA.  


Internet Security Systems is honored as Network Security Company of the Year by Frost & Sullivan. (January)

Internet Security Systems launches the Proventia Network Anomaly Detection System (ADS) to provide optimal visibility, integrity and protection for corporate networks. The ISS anomaly detection technology differs from traditional security offerings in that it provides a holistic view of anomalous behavior originating from both inside and outside network perimeters.

Internet Security Systems is recognized as the Best Security Company in the United States by SC Magazine

Internet Security Systems begins roll-out of Protection On-Demand strategy with the launch of the Virtual Security Operations Center (Virtual-SOC). With Protection On-Demand, ISS will offer customers a services-based approach for implementing security however, whenever and wherever they need it through the simple click of a button.