To protect a WLAN from WiFi sniffing, useful steps including changing the default administration password for the access point, such as a router, and making sure the firmware is up-to-date. One should also change the SSID (Service Set Identifier) name of the router, which is the public name and usually comes with a brand name as its default. Using network encryption and choosing Wi-Fi Protected Access (WPA), rather than Wired Equivalent Privacy (WEP), for encrypting are also good steps as well as using Secure Sockets Layer (SSL) encryption for browsing.
"As wifi becomes increasingly ubiquitous, the issue of wifi sniffing becomes more pressing. This article does a great job of outlining the risks and what you can do to protect yourself."
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