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ZyXEL NBG-416N Manual

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Appendix D Wireless LANs
NBG-416N User’s Guide
203
21.0.2 WPA(2)-PSK Application Example
A WPA(2)-PSK application looks as follows.
1 First enter identical passwords into the AP and all wireless clients. The Pre-Shared
Key (PSK) must consist of between 8 and 63 ASCII characters (including spaces
and symbols).
2 The AP checks each wireless client's password and (only) allows it to join the
network if the password matches.
3 The AP derives and distributes keys to the wireless clients.
4 The AP and wireless clients use the TKIP or AES encryption process to encrypt
data exchanged between them.
Figure 133 WPA(2)-PSK Authentication
21.0.3 WPA(2) with RADIUS Application Example
You need the IP address of the RADIUS server, its port number (default is 1812),
and the RADIUS shared secret. A WPA(2) 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.
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