We have cable internet at home. The main computer is hooked up the router and the cable box for the internet. My MacBook automatically picks up the signal to the internet under "linksys" and the downstairs computer does the same thing, but through the use of a wireless card, since it's an older computer. However, my mind got thinking yesterday because my sister came over with her laptop and was able to login to the internet without any problems. Her computer automatically picked up the wireless connection. Therefore, if she can do this, then i'm sure other people near our house can pick up our internet connection, with or without a good connection is not the point. How in the world can I password protect our internet connection? Is there such thing? If not, how can I make sure our internet connection is more secure than it is? Thanks for any help in advance!