Extreme Networks Altitude 4000 Series, Справочное руководство, Страница: 234 / 521

Chapter 7: Wireless Configuration
Altitude
TM
4000 Series Access Point System Reference Guide
234
WEP 64
“Configuring WLAN Security”
Wired Equivalent Privacy (WEP) is a security protocol specified in the IEEE Wireless Fidelity (Wi -Fi)
standard. WEP is designed to provide a WLAN with a level of security and privacy comparable to that
of a wired LAN.
WEP can be used with open, shared, MAC and 802.1 X EAP authentications. WEP is optimal for
WLANs supporting legacy deployments when also used with 802.1X EAP authentication to provide
user and device authentication and dynamic WEP key derivation and periodic key rotation. 802.1X
provides authentication for devices and also reduces the risk of a single WEP key being deciphered.
WEP 64 uses a 40 bit key concatenated with a 24-bit initialization vector (IV) to form the RC4 traffic key.
WEP 64 is a less robust encryption scheme than WEP 128 (containing a shorter WEP algorithm for a
hacker to potentially duplicate), but networks that require more security are at risk from a WEP flaw.
WEP is only recommended if there are client devices incapable of using higher forms of security. The
existing 802.11 standard alone offers administrators no effective method to update keys.
To configure WEP 64 encryption on a WLAN:
1 Select Configuration > Wireless > Wireless LANs to display a high-level display of the existing WLANs.
2 Select the Add button to create an additional WLAN, or select Edit to modify the properties of an
existing wireless controller WLAN.
3 Select Security .
4 Select the WEP 64 radio button from within the Select Encryption field.
The screen populates with the parameters required to define a WEP 64 configuration for the WLAN.