SENAO NOA-3570, User Manual

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NOA-3570 User’s Guide
72 Chapter 5 Wireless LAN
2 The AP checks each client’s password and (only) allows it to join the network if it
matches its password.
3 The AP derives and distributes keys to the wireless clients.
4 The AP and wireless clients use the TKIP encryption process to encrypt data exchanged
between them.
Figure 29 WPA - PSK Authentication
5.10 WPA with RADIUS Application Example
This example is for using WPA with an external RADIUS server. You need the IP address of
the RADIUS server, its port number (default is 1812), and the RADIUS shared secret. A WPA
application example with an external RADIUS server looks as follows. “A” is the RADIUS
server. “DS” is the distribution system.
1
The AP passes the wireless client’s authentication request to the RADIUS server.
2 The RADIUS server then checks the user's identification against its database and grants
or denies network access accordingly.
3 The RADIUS server distributes a Pairwise Master Key (PMK) key to the AP that then
sets up a key hierarchy and management system, using the pair-wise key to dynamically
generate unique data encryption keys to encrypt every data packet that is wirelessly
communicated between the AP and the wireless clients.