you’ve just installed a new wireless local area network (WLAN) in your small business or home. The access point is on and connected, the client PCs are connected to the access point, allowing you to connect to others and the Internet without worrying about wires.

But unlike a wired network, you can’t tell if an unauthorised person has accessed your WLAN. With WLANs you are using radio frequencies that in clear air have a range of up to 300 metres, so could somebody else be connecting into your system from the next street?

With many WLANs the default settings make you vulnerable to eavesdropping. But don’t worry: by taking a few simple steps, your wireless network can be as secure as a normal, wired LAN. In fact, some security experts even argue that WLANs can be more secure.

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