ZyXEL ZyWALL Internet Security Gateways Received ICSA Firewall Certification

The ZyWALL Product Group Certified under the 3.0a Firewall Certification Criteria

Hsinchu, Taiwan, August 29, 2002 - ZyXEL Communications Co. (TAI:2391.TW), an innovator and leading provider of broadband access solutions, today announced that its ZyWALL Internet security gateway series has been awarded Firewall certification by ICSA Labs. The ICSA Labs' Certification Program provides assurance to the user community that certified products meet industry-accepted product standards worldwide.

The ZyWALL series includes the ZyWALL 1, 10, 50, and 100, which are scaled to allow telecommuter, home, SOHO, or small business users to purchase a firewall with the exact number of VPN Tunnels. The ZyWALL features robust firewall and Internet content filtering, which allow the products to act as a secure gateway between the Internet and the LAN.

ZyWALL's firewall functionalities include stateful packet inspection and Denial of Service (DoS) attack prevention. These powerful features prevent unauthorized access, theft, destruction and modification of data from outside hackers. Other powerful features such as IPSec VPN, which use data encryption to provide transparent and secure transmission over the Internet, has been certified by ICSA Labs earlier in May.

ICSA Labs examines and test submitted firewall products under Version 3.0a Firewall Product Certification Criteria of the ICSA Labs Certification Program. The criteria is composed of both functional and assurance requirements, which defines an industry-accepted standard that all products claiming to have firewall capabilities must attain.

"We are very pleased that our ZyWALL series has been certified by ICSA Labs," said Felix Chang, Product Marketing Director of Firewall Business Unit. "Having a respected third party certification not only validates the depth of our Internet security solution, but it brings an additional level of confidence to our customers that we are delivering the best products possible."

All of the ZyWALL products are currently available and distributed through ZyXEL's global network of authorized distributors. To find ZyXEL resellers in a specific area, check http://www.zyxel.com/where/index.htm. More information on the ZyWALL products, visit http://www.zyxel.com/product/category.php?indexFlagvalue=1021873683

About ZyXEL Communications
ZyXEL Communications Co. (TAI:2391.TW), located in Hsinchu, Taiwan, is world's leading broadband access and Internet security solution provider. Products developed by ZyXEL over the years are not only industry leaders, but consistently win acclaim and are selected by worldwide telecommunications companies, ISPs, and other major businesses. ZyXEL now serves Deutsche Telekom, EarthLink (NASDAQ: ELNK), France Telecom (NYSE:FTE), Sprint, Telefonica, Telenor, Verizon (NYSE: VZ) and many others. For more information on ZyXEL Communications, visit company's Website at http://www.zyxel.com.

About ICSA Labs
ICSA Labs, an independent division of TruSecure Corporation, offers vendor-agnostic testing and certification of security products. Hundreds of the world's top security vendors submit their products for testing and certification at ICSA Labs. The end-users of security technologies rely on ICSA Labs to authoritatively set and apply objective testing and certification criteria for measuring product compliance and reliability. The organization tests 95% of products in key technology categories such as anti-virus, cryptography, PKI, IPSec, VPN, firewall, PC firewall, intrusion detection and content security. More information on ICSA Labs can be found on the ICSA Labs Web site at: http://www.icsalabs.com