3. Change the default password
For wireless products such as access points and routers, you will be asked for a password when you want to change their settings. These devices have a default password set by the factory. Hackers know these defaults and will try them to access your wireless device and change your network settings. To thwart any unauthorized changes, customize the device's password so it will be hard to guess.

4. Enable MAC address filtering
Routers give you the ability to enable MAC (Media Access Control) address filtering. The MAC address is a unique series of numbers and letters assigned to every networking device. With MAC address filtering enabled, wireless network access is provided solely for wireless devices with specific MAC addresses. For example, you can specify only the computers in your house to access your wireless network. It would be very difficult for a hacker to access your network using a random MAC address.

5. Enable Encryption
Encryption allows protection for data that is transmitted over a wireless network. Wired Equivalency Privacy (WEP) and Wi-Fi Protected Access (WPA) offer different levels of security for wireless communication. WPA is currently the most widely used level of encryption.

WPA is considered to be more secure than WEP, because it uses dynamic key encryption. To protect the information as it passes over the airwaves, you should enable the highest level of encryption that is supported by your network equipment.