I haven't commented in a while about the free Top Ten Network tools but Technitium MAC Address Changer v4.8 may be handy to protect your home wireless network against intruders. You will need to block anyone from connecting to your network except those who have network cards with specific MAC addresses. Sounds simple enough because you can set your router to block out intruders. The question is: how do you spoof a MAC address?
You can check it with this tool. You spoof a MAC address by providing one of your existing network cards a new address. This can be done with this software that lets you change your MAC address with a few simple clicks. You run the program, highlight the network card that you want to give a spoofed MAC address, click Random MAC Address, and then click the Change Now! button. Its pretty simple. It is then easy to restore your original MAC address, once you highlight it, and click "Original MAC."
Supplemental information is included about the details concerning your network cards, including the manufacturer name, MAC address, IP, Gateway, and DNS information associated with each of your network cards. It can also renew an IP address for a card, which can help fix broken network connections.