NAME

       netdiscover - an active/passive arp reconnaissance tool.

SYNOPSIS

       netdiscover [-i device] [-r range | -l file | -p] [-s time] [-n node] [-c count] [-f] [-d]
       [-S] [-P] [-L]

DESCRIPTION

       netdiscover is an active/passive arp reconnaissance  tool,  initially  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 local networks.

OPTIONS

       -i device
              The network interface to sniff and inject packets. If no  interface  is  specified,
              first available will be used.

       -r range
              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.

       -l file 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.

       -s time
              Sleep given time in milliseconds between each arp request injection. (default 1)

       -c count
              Number  of times to send each arp request. Useful for networks with packet loss, so
              it will scan given times for each host.

       -n node
              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  useful  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 ranges.

       -L     When  using  -P,  continue program execution after the active scan phase to capture
              ARP packets passively.

USAGE

       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 replies list

       r      Show arp requests list

       q      Close help screen or end application

CONFIG FILES

       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 files.

       ~/.netdiscover/ranges
              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.

              Example:
               192.168.21.0/24
               172.26.0.0/16
               10.0.0.0/8

       ~/.netdiscover/fastips
              List  contaning the last octect of the ips to be scanned on each subnet, when using
              fast mode, by default (1,100,154).

              Example:
               1
               10
               25
               254

AUTHOR

       netdiscover was written by Jaime Penalba Estebanez.

       This manual page was originally written by Nicolas Weyland, for the Debian  project.  This
       man page has been merged into netdiscover project, and modified from the original.