ZyWALL 5 User’s Guide
Chapter 6 Wireless LAN 103
6.4 WEP Encryption
WEP (Wired Equivalent Privacy) as specified in the IEEE 802.11 standard provides methods
for both data encryption and wireless station authentication. WEP provides a mechanism for
encrypting data using encryption keys. Both the AP and the wireless stations must use the
same WEP key to encrypt and decrypt data. Your ZyWALL allows you to configure up to four
64-bit or 128-bit WEP keys, but only one key can be used at any one time.
6.5 802.1x Overview
The IEEE 802.1x standard outlines enhanced security methods for both the authentication of
wireless stations and encryption key management. Authentication can be done using the local
user database internal to the ZyWALL (authenticate up to 32 users) or an external RADIUS
server for an unlimited number of users.
6.5.1 Introduction to RADIUS
RADIUS is based on a client-sever model that supports authentication and accounting, where
access point is the client and the server is the RADIUS server. The RADIUS server handles
the following tasks among others:
• Authentication
Determines the identity of the users.
• Accounting
Keeps track of the client’s network activity.
RADIUS user is a simple package exchange in which your ZyWALL acts as a message relay
between the wireless station and the network RADIUS server.
6.5.1.1 Types of RADIUS Messages
The following types of RADIUS messages are exchanged between the access point and the
RADIUS server for user authentication:
• Access-Request
WPA-PSK WEP Yes Enable
WPA-PSK TKIP Yes Enable
Table 23 Wireless Security Relational Matrix (continued)
AUTHENTICATION
METHOD/ KEY
MANAGEMENT PROTOCOL
ENCRYPTION
METHOD
ENTER
MANUAL KEY
IEEE 802.1X
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