Possible signal stealing.?

put a WEP or WPA encrytion signal on your Router. if you don't know how to do that, use the instruction manuel that came with your Router. every router has a different way of doing it so we'd have to know the model you have. but anyway WPA is a stronger signal and special hardware signal hacking stuff have harder times tapping into WPA signals. but WEP signals work better with older technology. so if you using older stuff. you might need a WEP signal. if you using newer stuff, WPA is the way to go. hope all that helps! have a great day!