![]() ![]() If I know that the WiFi network has poor coverage, I can set -c 3, as in the above example. You can opt to scan a specific network: netdiscover -i wlan0 -c 3 -r 192.168.1.0/24 In active mode, Netdiscover sends ARP packets itself to find devices. If you omit the -i wlan0 parameter, Netdiscover uses the first network interface that it finds.įigure 1: In passive mode, Netdiscover collects data on all the devices that have advertised their existence in the observation period. You launch Netdiscover in passive mode by typing netdiscover -i wlan0 -p In a WLAN, in which all the devices transmit on the same radio channel, you can accumulate a fairly extensive list of devices in a short time. In passive mode, it does not send packets but evaluates the network traffic flying by. Netdiscover supports active and passive modes. For our younger readers: Wardrivers would walk or drive through the neighborhood armed with a laptop looking for open or poorly protected wireless networks and, for example, drop the King James version of the Bible into the confused owner's printer spooler just as a little warning. This tool goes back to the days when wardriving was cool and widespread. ![]() With what? Well, normally with Netdiscover. So, in response, I connect my laptop to my neighbors' wireless LAN and check out the network. If their WiFi network is acting up, however, there's no escape. By now, friends and neighbors have realized that I cannot help them with Windows problems. "Charly, can you take a look at this? My (choose a computer term) isn't working!" This is a situation that eventually anyone who "does something in IT" gets into. ![]()
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