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NetScreen Extends Certifications to Include Important Worldwide Government Evaluation Standard

Sunnyvale, CA - June 16, 2003 - NetScreen Technologies, Inc. (Nasdaq: NSCN) today announced that its purpose-built, integrated firewall and virtual private network (VPN) security appliances and systems have achieved Common Criteria Evaluation Assurance Level 4 (EAL4) certification. Common Criteria is an important worldwide evaluation standard for security products, recognized in 16 countries and mandated by many government agencies for their critical systems and network purchases.

The Common Criteria EAL4 certification - backed by extensive analysis, verification and testing - is designed to assist prospective customers in judging the suitability of a security product measured against a set of security requirements and gives assurance that NetScreen’s certified firewall and VPN appliances have been rigorously tested and validated to meet these requirements.

“NetScreen prides itself on building high-performance appliances and systems that meet rigorous security requirements while providing low cost of ownership,” said David Flynn, vice president of marketing for NetScreen. “EAL4 extends NetScreen’s Common Criteria certifications and, in conjunction with other certifications such as FIPS, ICSA labs and OSEC, demonstrates our commitment to deliver full-featured and highly effective solutions for government organizations, enterprises and carriers.”

NetScreen’s integrated appliances and systems that achieved Common Criteria EAL4 certification include the NetScreen-5XT, -25, -50, -204, -208, -500, and -5200 running ScreenOS version 4.0.2. NetScreen’s EAL4 certification was completed using the U.S. Government Traffic-Filter Firewall Protection Profile for Low Risk Environments, which specifies an independent set of security requirements for firewall products.

NetScreen products that previously received Evaluation Assurance Level 2 (EAL2) certification using the associated firewall protection profile include the NetScreen-5XT, -50, -208, -500 and -5200 running ScreenOS version 4.0. In addition, selected NetScreen products have been submitted for Common Criteria EAL4+ certification using the Traffic-Filter Firewall Protection Profile for Medium Robustness Environments.

For more information about NetScreen products, visit: http://www.netscreen.com/products/index.jsp

For more information about NetScreen product certifications, visit: http://www.netscreen.com/resources/certifications.

For more information about Common Criteria, visit: www.commoncriteria.org* or www.itsec.gov.uk.

NetScreen, NetScreen ScreenOS and the NetScreen logo are trademarks of NetScreen Technologies, Inc. in the United States and other countries. Other trademarks are the property of their respective owners.

This press release contains forward-looking statements about events and circumstances that have not yet occurred. For example, words such as “will”, “can”, “allowing”, “believes”, “continue” and “continuing”, or other statements in the future tense, are forward-looking statements. Actual outcomes and results may differ materially from expectations in this press release due to a number of risks and uncertainties. Such risks and uncertainties include whether the market for security products will grow as projected, if at all, whether demand for NetScreen products will continue, whether new products, if and when introduced, will be successful and whether products will perform as expected.

* Specific NetScreen Common Criteria EAL4 certification information will be updated shortly on the Common Criteria web site.