Hi, On Fri, 28 Jun 2002, David [iso-8859-1] Laganière wrote:
> Say an intruder connect himself to my wireless LAN, is there a way with > a GPS and it's signal to know where he is physically? Where can I get > more documentation on that? since 802.11b (aka wavelan, wlan, airport network, etc.) uses spectrum spreading techniques to improve general performance by avoiding interference from wireless tv-cable transmitters, microwave ovens and any other signals/noise that might influence the connection, it's rather complicated to triangulate the position of the b4d b0yz with "traditional" utilities for finding an interfering transmitter. just an idea.. most access points support one or another form of displaying the signal strengths of their clients for optimizing you could try it by connecting a directional antenna to your access point and pointing it out of windows, down the road, etc. (or just sweeping 360 degrees around a few times) to see if the wavelan signal coming from the intruder gets stronger or weaker. mark this line on a map of your campus/building/neighbourhood. we'll use this as the x-axis (just for better understanding). then, if possible, move the access point to another place about 50m/150ft to the side and 50m/150ft in the direction where the intruder's signal seemed to come from. again, mark your position and the direction of the best signal on the map. now (theoretically speaking) you should have a point in the approximate area where the position of the attacker might be. when picking the best signal, be aware that trees, walls, any kind of physical obstacle to the radio waves (even cardboard boxes and chicken shacks) might weaken the signal strenght by quite a few percent. also make sure that the intruder doesn't notice you running around with a directional antenna and an access point. it might raise suspicion ;) good luck, tobias. -- NOC Hamster - Security Guy - Owner of one, root of many Tobias Rosenstock - [EMAIL PROTECTED] - [EMAIL PROTECTED] - [EMAIL PROTECTED] Wieske's Crew KG - http://irz42.net - http://www.crew-kg.de Humboldtstr. 51 - Lessingstr. 2 - 22083 Hamburg - Germany
