ZyXEL ADSL Prestige 660HW-61 91-004-361001 Manual Do Utilizador

Prestige 660H/HW Series User’s Guide

 Splitters and Microfilters

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As wireless networks become popular for both portable computing and corporate networks, 
security is now a priority. 

Wireless networks based on the original IEEE 802.11 have a poor reputation for safety. The 
IEEE 802.11b wireless access standard, first published in 1999, was based on the MAC 
address. As the MAC address is sent across the wireless link in clear text, it is easy to spoof 
and fake. Even the WEP (Wire Equivalent Privacy) data encryption is unreliable as it can be 
easily decrypted with current computer speed 

User account management has become a network administrator’s nightmare in a corporate 
environment, as the IEEE 802.11b standard does not provide any central user account 
management. User access control is done through manual modification of the MAC address 
table on the access point. Although WEP data encryption offers a form of data security, you 
have to reset the WEP key on the clients each time you change your WEP key on the access 
point. 

In June 2001, the IEEE 802.1x standard was designed to extend the features of IEEE 802.11 to 
support extended authentication as well as providing additional accounting and control 
features. It is supported by Windows XP and a number of network devices. 

• User based identification that allows for roaming.
• Support for RADIUS (Remote Authentication Dial In User Service, RFC 2138, 2139) for 

centralized user profile and accounting management on a network RADIUS server. 

• Support for EAP (Extensible Authentication Protocol, RFC 2486) that allows additional 

authentication methods to be deployed with no changes to the access point or the wireless 
clients.