D-Link DWL-8500AP, Руководство администратора

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Configuring Virtual Access Point Security 47
4 Configuring Access Point Security
NOTE: After you configure the security settings, you must click Update to apply the
changes and to save the settings. Changing some access point settings might
WEP Keys You can specify up to four WEP keys. In each text box, enter a string of
characters for each key.
If you selected “ASCII”, enter any combination ASCII characters. If you
selected “HEX”, enter hexadecimal digits (any combination of
0-9
and
a-f
or
A-F
).
Use the same number of characters for each key as specified in the
“Characters Required” field. These are the RC4 WEP keys shared with the
stations using the access point.
Each client station must be configured to use one of these same WEP keys in
the same slot as specified here on the AP. (See
“Static WEP Rules” on
page 48.)
Characters Required: The number of characters you enter into the WEP
Key fields is determined by the Key length and Key type you select. For
example, if you use 128-bit ASCII keys, you must enter 26 characters in the
WEP key. The number of characters required updates automatically based on
how you set Key Length and Key Type.
Authentication The authentication algorithm defines the method used to determine whether a
client station is allowed to associate with an access point when static WEP is
the security mode.
Specify the authentication algorithm you want to use by choosing one of the
following options:
• Open System
• Shared Key
Note: You can also select both the Open System and Shared Key check
boxes.
Open System authentication allows any client station to associate with the
access point whether that client station has the correct WEP key or not. This
algorithm is also used in plain text, IEEE 802.1X, and WPA modes. When
the authentication algorithm is set to “Open System,” any client can associate
with the access point.
Note that just because a client station is allowed to associate does not ensure
it can exchange traffic with an access point. A station must have the correct
WEP key to be able to successfully access and decrypt data from an access
point, and to transmit readable data to the access point.
Shared Key authentication requires the client station to have the correct
WEP key in order to associate with the access point. When the authentication
algorithm is set to “Shared Key,” a station with an incorrect WEP key will
not be able to associate with the access point.
Both Open System and Shared Key. When you select both authentication
algorithms, client stations configured to use WEP in shared key mode must
have a valid WEP key in order to associate with the access point. Also, client
stations configured to use WEP as an open system (shared key mode not
enabled) will be able to associate with the access point even if they do not
have the correct WEP key.
Table 11.
Static WEP
Field Description