ZyXEL g-2000 plusv2 Guia Do Utilizador

ZyXEL G-2000 Plus v2 User’s Guide

Chapter 6 Wireless LAN

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• In the AP: this feature is called a local user database or a local database.
• In a RADIUS server: this is a server used in businesses more than in homes.

If your AP does not provide a local user database and if you do not have a RADIUS server, 
you cannot set up user names and passwords for your users.

Unauthorized devices can still see the information that is sent in the wireless network, even if 
they cannot use the wireless network. Furthermore, there are ways for unauthorized wireless 
users to get a valid user name and password. Then, they can use that user name and password 
to use the wireless network.

Local user databases also have an additional limitation that is explained in the next section.

Wireless networks can use encryption to protect the information that is sent in the wireless 
network. Encryption is like a secret code. If you do not know the secret code, you cannot 
understand the message.

The types of encryption you can choose depend on the type of wireless network login. (See 

 for information about this.)

For example, if the wireless network has a RADIUS server, you can choose IEEE 802.1x, 
IEEE 802.1x + Static WEP, WPA or WPA2. If users do not log in to the wireless network, 
you can choose no encryption, Static WEP, WPA-PSK, or WPA2-PSK.

Usually, you should set up the strongest encryption that every device in the wireless network 
supports. For example, suppose you have a wireless network with the ZyXEL device. The 
ZyXEL device does not have a local user database, and you do not have a RADIUS server. 
Therefore, there is no wireless network login. Suppose the wireless network has two devices. 
Device A only supports WEP, and device B supports WEP and WPA. Therefore, you should 
set up Static WEP in the wireless network.

Table 22   Types of Encryption for Each Type of Wireless Network Login

None