Do you know of any good 802.11i how-to guides?
The 802.11i standard is relatively new and it will take awhile for good how-to documentation to emerge based on the final standard. But there are a few good books based on preliminary versions of 802.11i. Here are two that I recommend:
Real 802.11 Security: Wi-Fi Protected Access and 802.11i (Arbaugh, Edney)
Certified Wireless Security Professional Study Guide (Planet3 Wireless)
802.11i can help you centralize authentication by chaining local RADIUS servers at each location to one master RADIUS server, or by configuring RADIUS to consult a central user database, like an Active Directory or an ACE Server. You probably want a RADIUS server at each location to reduce 802.1x latency. Make sure that inter-site traffic between local RADIUS servers and your central authentication server is secured (for example, using VPN tunnels). In this way, you'll only need to configure user accounts, passwords and permissions at one central server. Access Points at every site will relay WLAN access requests over 802.1X, through the local RADIUS server, to that central authority.
Dig Deeper on Wireless LAN (WLAN)
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