Conference, San Francisco, Calif., Booth 1148, February 14, 2005 – Arbor Networks®, a leading provider of internal network security systems, today announced that Comerica [NYSE: CMA], has chosen Arbor Networks’ Peakflow® X to protect its network from worms and cyber threats, and to ensure the highest level of security for its customers.

Comerica selected Arbor's Peakflow X for its Worm Vaccine™ and Safe Quarantine™ capabilities, as well as its network-wide visualization of internal traffic. Worm Vaccine enables Comerica to proactively harden its network before new vulnerabilities are known. Safe Quarantine provides zero-day detection and mitigation, which stops network worms from propagating without interrupting the bank’s critical services and business processes.

“Comerica is committed to providing our customers with the best financial solutions available today and offering them through the most secure network possible. We already have strong perimeter defenses, but as attacks become more complex and better able to circumvent the perimeter, bolstering internal defenses is quickly becoming necessary,” said Scott Vowels, vice president of security architecture and engineering of Comerica. “We found that Peakflow X leverages our existing infrastructure to give us a clear view of our internal network, while protecting us from both known and unknown threats.”

While today’s fast-spreading worms have stymied traditional perimeter security products such as firewalls, intrusion detection systems (IDSs) and traditional intrusion prevention systems (IPSs), Arbor's Peakflow X addresses these challenges by detecting and mitigating threats without the use of signatures.

“Enterprise networks need internal intrusion prevention systems for real-time situational awareness to stop worms and to harden internal infrastructure,” said Tom Schuster, president of Arbor Networks. “Arbor's Peakflow is helping Comerica protect their infrastructure and consequently protect their customers.”

Arbor's Peakflow’s real-time network wide situational awareness is the cornerstone for securing internal networks. With Arbor's Peakflow, worms can be stopped in their tracks or even proactively prevented; networks can be hardened without disrupting the business; and insider misuse – even in the most complicated environments – can be detected and stopped.

About Arbor Networks
Arbor Networks’ Peakflow is the most broadly deployed network integrity platform in the world, with over 100 customers that include leading service providers, MSOs in North America, Europe and Asia Pacific, the U.S. Department of Defense, and Fortune 500 companies. Arbor’s network integrity systems protect organizations from zero-day security threats such as DDoS attacks and worms, and operational vulnerabilities such as inefficient peering and routing instability. Built upon the proven Arbor Peakflow platform, Arbor solutions provide accurate, real-time awareness of behavior across the entire network, enabling organizations to better secure and more efficiently operate their networks. Arbor is headquartered in Lexington, MA, with a research and development office in Ann Arbor, MI and EMEA headquarters in London and Beijing. For more information, please visit http://www.arbornetworks.com.

About Comerica
Comerica Incorporated is a financial services company headquartered in Detroit, strategically aligned into three major lines of business: the Business Bank, Small Business & Personal Financial Services, and Wealth & Institutional Management. Comerica’s approximately 11,000 employees focus on relationships, and helping people and businesses be successful. Comerica Bank locations can be found in Michigan, California, Texas and Florida, with select businesses operating in several other states, Canada and Mexico. Comerica reported total assets of $51.8 billion at December 31, 2004. To receive e-mail alerts of breaking Comerica news, go to www.comerica.com/newsalerts.

Copyright (c) 1999-2004 Arbor Networks, Inc. All rights reserved. Arbor Networks and Peakflow are registered trademarks and the Arbor Networks logo and ArbOS are trademarks of Arbor Networks, Inc. in the USA and other countries. All other trademarks are the property of their respective owners.

Media Inquiries:
Kate Munro            
+1 781.768.3253    
+1 978.771.3006        
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Marcia Goff/Michael Goff
Goff Communications
+1 508.416.3765
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it or This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

EMEA
Mo Murphy, Folliard
office: +44 (0)207 686 0625
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it

Wayne Mielke
Comerica
+1.313.222.4732
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it