ZyXEL Communications G-570U Betriebsanweisung PDF herunterladen (Seite 73)

ZyXEL G-570U User’s Guide

Chapter 6 Wireless Screens 73

Figure 43 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 G-570U'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 G-570U will accept either type of authentication

request and the G-570U will fall back to use open authentication if the shared key does not

match.

6.6 802.1x 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 G-570U (authenticate up to 32 users) or an external RADIUS

server for an unlimited number of users.

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ZyXEL Communications G-570U Betriebsanweisung Seite 73