netdiscover - an active/passive arp reconnaissance tool.
netdiscover [-i device] [-r range | -l file | -p] [-s time] [-n node]
[-c count] [-f] [-d] [-S] [-P] [-L]
netdiscover is an active/passive arp reconnaissance tool, initialy
developed to gain information about wireless networks without dhcp
servers in wardriving scenarios. It can also be used on switched
networks. Built on top of libnet and libpcap, it can passively detect
online hosts or search for them by sending arp requests.
Furthermore, it can be used to inspect your network’s arp traffic, or
find network addresses using auto scan mode, which will scan for common
The network interface to sniff and inject packets. If no
interface is specified, first available will be used.
Scan a given range instead of auto scan. Valid range values area
for example: 192.168.0.0/24, 192.168.0.0/16 or 192.168.0.0/8.
Scan ranges contained on the given file, it must contain one
range per line.
-p Enable passive mode. In passive mode, netdiscover does not send
anything, but does only sniff.
Sleep given time in milliseconds between each arp request
injection. (default 1)
Number of times to send each arp request. Useful for networks
with packet loss, so it will scan given times for each host.
Last ip octet of the source ip used for scanning. You can change
it if the default host is already used. (allowed range: 2 to
253, default 66)
-S Enable sleep time suppression between each request. If set,
netdiscover will sleep after having scanned 255 hosts instead of
sleeping after each one. This mode was used in netdiscover 0.3
beta4 and before. Avoid this option in networks with packet
loss, or in wireless networks with low signal level. (also
called hardcore mode)
-f Enable fast mode scan. This will only scan for .1, .100 and .254
on each network. This mode is usefull while searching for ranges
being used. After you found such range you can make a specific
range scan to find online boxes.
-d Ignore configuration files at home dir, this will use defaults
ranges and ips for autoscan and fast mode. See below for
information about configuration files.
-P Produces output suitable to be redirected into a file or be
parsed by another program, instead of using interactive mode.
Enabling this option, netdiscover will stop after scanning given
-L When using -P, continue program execution after the active scan
phase to capture ARP packets passively.
If passive mode (-p), scan list (-l) or scan range (-r) options arent
enabled, netdiscover will scan for common lan addresses.
Screen control keys
h Show help screen
j Scroll down (or down arrow)
k Scroll up (or up arrow)
a Show arp replys list
r Show arp requests list
q Close help screen or end application
There are 2 configuration files that netdiscover will look for, each
time it is executed, if file doesnt exist it will use default values.
You can use the -d switch to disable reading and loading configuration
This file contains a list of ranges (one per line) used for auto
scan mode instead of default ranges. By default netdiscover will
use a list of common ranges used on local networks.
List contaning the last octect of the ips to be scanned on each
subnet, when using fast mode, by default (1,100,154).
netdiscover was written by Jaime Penalba Estebanez.
This manual page was originaly written by Nicolas Weyland, for the
Debian project. This man page has been merged into netdiscover project,
and modified from the original.