The security trade-offs were discussed in Section 15.1.2. In many cases, an IPSec-based VPN is the logical choice. IPSec was designed for precisely the environment that wireless LANs typify. Intruders can easily capture traffic and perform extensive offline attacks with stored data. Now that IPSec is evolving to support remote clients connecting to central sites, it can also be used to provide strong authentication without a difficult PKI rollout. Many products now support one of the various standards to allow an IPSec termination device to perform user authentication through RADIUS, which allows administrators to take advantage of existing authentication databases. The new 802.1x standard incorporates RADIUS; unless there's a critical problem in 802.1x (as there was in WEP), future wireless security is likely to be based on the 1x standard.
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