Re: How can I find out if anyone is stealing my wireless internet?
I got a better idea, I use it in my University halls (I'm not paying for everybodys interent).
Most routers have the ability to allow access to it from only a list of certain MAC addresses. Considering this is on a hardware level, below IP address and that sorts, it would make sense to only allow the 5 MAC addresses of your wireless network adapters in you computers to be allowed to connect to the router. I have done this. The effect is that it blocks all adapters other than is allowed on the MAC address list from getting any response from the router, even stopping other computers from detecting that a wireless network is present in some cases.
If your router supports only allowing certain MAC addresses you can find out the MAC addresses of all your adapters usually from the properties page in the device manager in each computer. Then if you want to, apply other encryption methods, but really there should be no need, as no other adapters will be able to comunicate with the router on a hardware (therefore on any other level, protocol and software) level. Like Fort Knoxs.
Delta: "What's wrong Chris?? Chris: "I miss my old Cyrix"