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China Unicom Selects NetScreen To Secure Its Internet Data and Managed Services Centers

Sunnyvale, CA - August 18, 2003 - NetScreen Technologies, Inc. (Nasdaq: NSCN) today announced that China Unicom Limited (NYSE: CHU; HKSE: 0762) has selected NetScreen to provide firewall and security solutions for its Internet Data and Managed Services Centers.

China Unicom’s Internet Data Center has selected NetScreen devices to provide managed firewall functionality for its Internet Data Center service network, which covers major cities including Beijing, Shanghai, Guangzhou, Chengdu, Hangzhou, Jinan, Shenyang, Wuhan and Xian. At the three core sites of the Internet Data Center - Beijing, Shanghai, Guangzhou - NetScreen-500 systems are deployed to protect and support managed firewall servers, while NetScreen-100 appliances are deployed to protect internal servers. Multiple NetScreen-100 appliances have also been installed at other sites to provide distributed firewall functionality and establish secure connections to the central site.

The NetScreen-500 systems provides robust integrated firewall and virtual private network (VPN) functionality - up to 700 Mbps firewall performance and 3DES VPN performance of up to 250 Mbps - and virtual systems capabilities, a technology pioneered by NetScreen to allow logical partitioning of a network into security zones with distinct configurations and policies. With this functionality, service providers and carriers can provide security services for multiple customers using a single device, offering significant management and cost benefits. The NetScreen-100 appliances provide 200 Mbps firewall and 185 Mbps VPN throughput.

"As one of China's largest ISPs, China Unicom recognizes the importance of selecting security solutions that provide scalability and minimize management complexities," said David Flynn, vice president of marketing for NetScreen. "Our solutions can scale from supporting managed services to high performance infrastructure environments, allowing China Unicom to protect their network and create new business drivers via efficiently managed offerings."

About NetScreen Technologies

NetScreen Technologies, Inc., is a leading developer of integrated network security solutions that offer the security, performance and total cost of ownership required by enterprises and carriers. NetScreen’s innovative solutions provide key security technologies, such as virtual private network, denial of service protection, firewall and intrusion prevention, in a line of easy-to-manage security appliances and systems. NetScreen is located at 805 11th Ave., Sunnyvale, CA, 94089. More information on NetScreen’s products can be found at http://www.netscreen.com or by calling toll free at 1-800-638-8296.

NetScreen 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”, “provide”, “enabling” and “continue”, 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.