ZyXEL Communications P-870HW-51A V2, Руководство пользователя

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Chapter 7 Wireless LAN
P-870HW-51a v2 User’s Guide
91
This type of security does not protect the information that is sent in the wireless network.
Furthermore, there are ways for unauthorized wireless devices to get the MAC address of an
authorized device. Then, they can use that MAC address to use the wireless network.
7.9.3.3 User Authentication
Authentication is the process of verifying whether a wireless device is allowed to use the
wireless network. You can make every user log in to the wireless network before they can use
it. However, every device in the wireless network has to support IEEE 802.1x to do this.
For wireless networks, you can store the user names and passwords for each user in a RADIUS
server. This is a server used in businesses more than in homes. If you do not have a RADIUS
server, you cannot set up user names and passwords for your users.
Unauthorized wireless 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.
7.9.3.4 Encryption
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 authentication. (See Section
7.9.3.3 on page 91 for information about this.)
For example, if the wireless network has a RADIUS server, you can choose 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 and you
do not have a RADIUS server. Therefore, there is no authentication. 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.
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It is recommended that wireless networks use WPA-PSK , WPA , or stronger
encryption. The other types of encryption are better than none at all, but it is
still possible for unauthorized wireless devices to figure out the original
information pretty quickly.
Table 28 Types of Encryption for Each Type of Authentication
NO AUTHENTICATION RADIUS SERVER
Weakest No Security
WPA
Static WEP
WPA-PSK
Strongest WPA2-PSK WPA2