Equinox Systems ZyAIR G-200 27

ZyAIR G-200 User’s Guide

Figure 2-9 WEP Authentication Steps

Open System authentication involves an unencrypted two-message procedure. A wireless station sends an open system authentication request to the AP, which will then automatically accept and connect the wireless station to the network. In effect, open system is not authentication at all as any station can gain access to the network.

Shared Key authentication involves a four-message procedure. A wireless station sends a shared key authentication request to the AP, which will then reply with a challenge text message. The wireless station must then use the AP’s default WEP key to encrypt the challenge text and return it to the AP, which attempts to decrypt the message using the AP’s default WEP key. If the decrypted message matches the challenge text, the wireless station is authenticated.

When your ZyAIR's authentication method is set to open system, it will only accept open system authentication requests. The same is true for shared key authentication. However, when it is set to auto authentication, the ZyAIR will accept either type of authentication request and the ZyAIR will fall back to use open authentication if the shared key does not match.

Using the ZyAIR Utility

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Contents

Page Copyright Copyright ©2004 by ZyXEL Communications Corporation Disclaimer Trademarks ZyXEL Limited Warranty NOTE Online Registration Information for Canadian Users Caution Note Federal Communications Commission (FCC) Interference Statement Notice Certifications Page Customer Support Page Table of Contents Page List of Figures List of Tables Preface About This User's Guide Syntax Conventions Related Documentation User Guide Feedback Page Chapter Getting Started 1.1ZyAIR Hardware and Utility Installation 1.2Disable Windows XP Wireless LAN Configuration Tool Figure 1-3Windows XP: Wireless Network Connection Status Properties Wireless Networks Figure 1-4Windows XP: Connect to Wireless Network 1.3Accessing the ZyAIR Utility Page Using the ZyAIR Utility 2.1About Wireless LAN Network 2.1.1SSID 2.1.2 Channel 2.1.3 Transmission Rate 2.1.5 Roaming 2.2The Link Info Screen 2.3The Site Survey Screen 2.3.1Connecting to a Wireless Network 2.4The Configuration Screen 2.5Wireless LAN Security 2.6The Security Configuration Screen 2.6.1 Data Encryption with WEP Page Figure 2-10WEP Authentication Table 2-4WEP Authentication 2.6.2 Data Encryption with WPA Encryption 2.6.3 Data Encryption with WPA-PSK WPA-PSKApplication Example WPA with RADIUS Application Example Page 2.6.4 Data Encryption with 2.7The About Screen Figure 2-16About Table 2-8About Maintenance 3.1Removing the ZyAIR Utility 3.2Upgrading the ZyAIR Utility 3.3Disconnecting the ZyAIR Safely Remove Hardware Hardware devices Stop Stop a Hardware device Page Page Troubleshooting 4.1Problems Starting the ZyAIR Utility Program 4.2Problems Communicating With Other Computers 4.3Problem with the Link Status 4.4The ZyAIR Does Not Respond Appendix A Wireless LAN and IEEE Benefits of a Wireless LAN Ad-hocWireless LAN Configuration Infrastructure Wireless LAN Configuration Appendix B Wireless LAN With IEEE Security Flaws with IEEE Deployment Issues with IEEE Advantages of the IEEE Diagram 4-3Sequences for EAP MD5–ChallengeAuthentication Appendix C Types of EAP Authentication EAP-MD5 (Message-DigestAlgorithm 5) EAP-TLS(Transport Layer Security) EAP-TTLS(Tunneled Transport Layer Service) Comparison of EAP Authentication Types Appendix D Product Specifications Page Index