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Chapter 10 Wireless Security Screen
NWA-3500/NWA-3550 User’s Guide
165
The following table describes the labels not previously discussed
Table 43 Security: WPA2 or WPA2-MIX
LABEL DESCRIPTIONS
Profile Name Type a name to identify this security profile.
Security Mode Choose WPA2 or WPA2-MIX in this field.
ReAuthentication
Timer
Specify how often wireless stations have to resend usernames and
passwords in order to stay connected.
The default value is 0, which means the reauthentication off.
Note: If wireless station authentication is done using a RADIUS
server, the reauthentication timer on the RADIUS server
has priority.
Idle Timeout The NWA automatically disconnects a wireless station from the wired
network after a period of inactivity. The wireless station needs to
enter the username and password again before access to the wired
network is allowed.
The default time interval is 3600 seconds (or 1 hour).
Group Key
Update Timer
The Group Key Update Timer is the rate at which the AP sends a
new group key out to all clients. The re-keying process is the WPA
equivalent of automatically changing the group key for an AP and all
stations in a WLAN on a periodic basis. Setting of the Group Key
Update Timer is also supported in WPA-PSK mode. The NWA‘s
default is 1800 seconds (30 minutes).
PMK Cache When a wireless client moves from one AP’s coverage area to
another, it performs an authentication procedure (exchanging
security information) with the new AP. Instead of re-authenticating a
client each time it returns to the AP’s coverage area, which can cause
delays to time-sensitive applications, the AP and the client can store
(or “cache”) and use information about their previous authentication.
Select Enable to allow PMK caching, or Disable to switch this
feature off.
Pre-
Authentication
Pre-authentication allows a wireless client to perform authentication
with a different AP from the one to which it is currently connected,
before moving into the new AP’s coverage area. This speeds up
roaming. Select Enable to allow pre-authentication, or Disable to
switch it off.
Apply Click Apply to save your changes.
Reset Click Reset to begin configuring this screen afresh.