cube_rat said:
You're such an uber-geek, CFB
Yes I am, with or without my pants on.
Jerry...about 100-1500 feet, depending on the router, how you've placed it, and the construction of the homes and other obstructions. If you mounted it on top of the peak of your roof, flat area, no trees, etc and have a very good router, maybe you get into the vicinity of 'seeing' it from 1500 feet away. On a desk or a shelf with a few walls, thick home construction, lots of trees, hilly area...you might have trouble picking it up from the street.
Take your laptop and start walking away with it. See where you lose the signal. Thats how far it can be picked up with your laptop. Some machines can be equipped with extra sensitive cards and a big "stick" antenna, and can pick up a signal from further.
Martha...to find out "who" owns the AP, either your laptops included software or freebie downloadable software you can detect signal strength and frequently distance. My new toshiba shows a radar/sonar type screen that shows how far away any available AP's are. Basically walk out the door and keep going until you're standing in front of someones house with the strongest signal level.
Fireme, Kramer: using someone elses AP without their permission may be morally gray, but its legally red. In many states this is considered illegally accessing a computer network. While the user has not taken actions to secure it, one also can leave their front door unlocked and have a reasonable expectation that someone wont come in and use their stuff. In some states you have to have made an attempt to secure the AP and the hacker has to have used extraordinary methods to gain access. In others, there is no hard law or precedent. In some states, it might land you in jail.
The other end of this is that if you do something illegal (say viewing kiddie porn) using the guys open AP (or if someone does it using YOUR open AP), its all you baby. The cops will come to your door and unless you can make a pretty good case for proof on it being some 'mystery' outside user you cant identify or name, buh bye.