AP-51xx Access Point Product Reference Guide
6-24
9.
Click the
Apply
button to save any changes made within this New Security Policy screen.
10. Click the
Cancel
button to undo any changes made within the WPA/TKIP Settings field and
return to the
WLAN
screen. This reverts all settings to the last saved configuration.
6.9 Configuring WPA2-CCMP (802.11i)
WPA2 is a newer 802.11i standard that provides even stronger wireless security than Wi-Fi Protected
Access (WPA) and WEP. CCMP is the security standard used by the
Advanced Encryption Standard
(AES).
AES serves the same function TKIP does for WPA-TKIP. CCMP computes a
Message Integrity
Check (MIC)
using the proven
Cipher Block Chaining (CBC)
technique. Changing just one bit in a
message produces a totally different result.
WPA2/CCMP is based on the concept of a
Robust Security Network (RSN),
which defines a hierarchy
of keys with a limited lifetime (similar to TKIP). Like TKIP, the keys the administrator provides are used
to derive other keys. Messages are encrypted using a 128-bit secret key and a 128-bit block of data.
The end result is an encryption scheme as secure as any the access point provides.
To configure WPA2-CCMP on the access point:
1.
Select
Network Configuration
->
Wireless
->
Security
from the access point menu tree.
If security policies supporting WPA2-CCMP exist, they appear within the
Security
Configuration
screen. These existing policies can be used as is, or their properties edited
by clicking the
Edit
button. To configure a new security policy supporting WPA2-CCMP,
continue to step 2.
2.
Click the
Create
button to configure a new policy supporting WPA2-CCMP.
The
New Security Policy
screen displays with no authentication or encryption options
selected.
3.
Select the
WPA2/CCMP (802.11i)
checkbox.
The
WPA2/CCMP Settings
field displays within the New Security Policy screen.
4.
Ensure the
Name
of the security policy entered suits the intended configuration or function
of the policy.
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