ExtremeTech lists five common tech mistakes and explains how to solve them.
Mistake Number One: Leaving your Wireless Network Unprotected
That nameless guy in the intro did the right thing in enabling WEP to protect his wireless network. It wasn't, however, enough. If he'd updated the router's firmware, he'd have had access to better options.
Wireless networks transmit your Internet access and any network shares you have to the entire world. Well, not quite, but the range can be a few hundred feet, and people next door can help themselves to your network resources (this is known as leeching).
Your router's options panel is the key to protecting your wireless network from intruders. Every router has a different interface: some you access through programs you install on your computer, and many can be accessed via a Web browser.>/blcokquote>
Check it out over here.