Perimeter Ranked Number 331 in the Top 500 Fastest Growing Companies
in North America on Deloitte’s 2006 Technology Fast 500 and
Number 9 in the Connecticut Technology Fast 50

Attributes its 410 Percent Revenue Growth to its Leadership in Providing
Complete Security On Demand to the Marketplace 

Milford, CT - October 19, 2006 — Perimeter today announced that it ranked Number 331 on Deloitte’s 2006 Technology Fast 500, a ranking of the 500 fastest growing technology, media, telecommunications and life sciences companies in North America. Rankings are based on percentage revenue growth over five years, from 2001–2005. Perimeter grew 410 percent during this period. Perimeter's CEO Brad Miller credits the company's 410 percent revenue growth from 2001–2005 to Perimeter’s unique business approach of providing complete security on demand, also known as security-as-a-service. Perimeter has also achieved profitability in each of the past five years.

“Perimeter is at the forefront of a young but large and growing market of companies trying to offer security on demand,” said Brad Miller, CEO of Perimeter Internetworking. “Having pioneered security-as-a-service six years ago, our success comes from the fact that we have been doing it the longest and accordingly, have the most complete offering available. Just as salesforce.com revolutionized the CRM market, Perimeter is doing the same thing for IT security, selling functionality rather than products, and making this functionality affordable to SMBs.”

Security-as-a-service is experiencing rapid growth now because average companies are increasingly impacted by the growing number of security threats and they have hundreds of security technologies available from thousands of vendors to choose from to combat these threats. The average company does not have the budget or staff to research, buy, implement, integrate and continuously update a security solution. Perimeter has pre-integrated over 50 on demand security services to address every potential threat to our clients’ businesses including Intrusion Defense, System Defense, User Defense, Email Defense, Vulnerability Defense, Secure Networking and guarantees them for current and future regulatory compliance.

Security-as-a-service is much like the pay-per-view services that a cable company offers. “Our 3600 clients plug into our security infrastructure which provides the top 50 security tools available today and they access their subscribed services on demand,” Miller added. “They just need to contact us to order a new service and have it up and running almost instantly.”

“Sustaining high revenue growth over five years is an exceptional accomplishment. We commend Perimeter for making the commitment to technology and delivering on the promise of market longevity,” said Tony Kern, deputy managing principal of Deloitte’s Technology, Media & Telecommunications industry practice. We are proud to honor Perimeter’s ranking on the Deloitte Technology Fast 500 list.”

In addition to ranking on Deloitte’s Technology Fast 500, Perimeter ranked 9th on the Connecticut Technology Fast 50, which is a ranking of the 50 fastest growing technology firms in the state. Overall, companies that ranked on the 2006 Technology Fast 500 had growth rates ranging from 209 to 48,948 percent over five years, with an average growth rate of 2,145 percent.

Fast 500 Selection and Qualifying Criteria
The Fast 500 ranks the fastest growing technology, media, telecommunications and life sciences companies in North America. It is compiled from Deloitte’s 16 regional North American Fast 50 programs, nominations submitted directly to the Fast 500, and public company database research. Companies are selected based on percentage revenue growth from 2001 to 2005.

Entrants must own proprietary intellectual property or proprietary technology that contributes to a significant portion of the company's operating revenues or devote a significant proportion of revenues to research and development of technology. Using other companies' technology or intellectual property in a unique way does not qualify. Base-year operating revenues must be at least $50,000 USD or $75,000 CD, and current-year operating revenues must be at least $5 million USD or CD. Companies must be in business a minimum of five years, and they must be headquartered within North America.

About Deloitte
Deloitte refers to one or more of Deloitte Touche Tohmatsu, a Swiss Verein, its member firms, and their respective subsidiaries and affiliates. Deloitte Touche Tohmatsu is an organization of member firms around the world devoted to excellence in providing professional services and advice, focused on client service through a global strategy executed locally in nearly 150 countries. With access to the deep intellectual capital of approximately 135,000 people worldwide, Deloitte delivers services in four professional areas—audit, tax, consulting, and financial advisory services—and serves more than one-half of the world’s largest companies, as well as large national enterprises, public institutions, locally important clients, and successful, fast-growing global growth companies. Services are not provided by the Deloitte Touche Tohmatsu Verein, and, for regulatory and other reasons, certain member firms do not provide services in all four professional areas.

As a Swiss Verein (association), neither Deloitte Touche Tohmatsu nor any of its member firms has any liability for each other’s acts or omissions. Each of the member firms is a separate and independent legal entity operating under the names “Deloitte,” “Deloitte & Touche,” “Deloitte Touche Tohmatsu,” or other related names.

In the US, Deloitte & Touche USA LLP is the US member firm of Deloitte Touche Tohmatsu and services are provided by the subsidiaries of Deloitte & Touche USA LLP (Deloitte & Touche LLP, Deloitte Consulting LLP, Deloitte Financial Advisory Services LLP, Deloitte Tax LLP and their subsidiaries), and not by Deloitte & Touche USA LLP. The subsidiaries of the US member firm are among the nation's leading professional services firms, providing audit, tax, consulting and financial advisory services through nearly 30,000 people in more than 80 cities. Known as employers of choice for innovative human resources programs, they are dedicated to helping their clients and their people excel. For more information, please visit the US member firm’s web site at www.deloitte.com/us.

About Perimeter
As the only provider of complete security on demand, Perimeter makes security easily available and affordable for all businesses. Perimeter's on demand security services protect thousands of computer networks nationwide, offering more than 50 different services on a subscription basis. With the proliferation of security threats and technologies, clients benefit from a single-source provider that offers all services through one pre-integrated platform and web portal.

Perimeter's on demand services are continuously expanded, enhanced and upgraded for current and future regulatory compliance. With seven geographically distributed technical offices and three redundant data centers, Perimeter's complete, on-demand and affordable security services are always available and have been validated by multiple independent third parties. For more information about Perimeter visit www.perimeterusa.com or call (800) 234-2175 opt # 2.