NAME

       arpspoof - intercept packets on a switched LAN

SYNOPSIS

       arpspoof [-i interface] [-c own|host|both] [-t target] [-r] host

DESCRIPTION

       arpspoof  redirects  packets  from  a  target  host (or all hosts) on the LAN intended for
       another host on the LAN by forging ARP replies.  This is an  extremely  effective  way  of
       sniffing traffic on a switch.

       Kernel   IP   forwarding  (or  a  userland  program  which  accomplishes  the  same,  e.g.
       fragrouter(8)) must be turned on ahead of time.

OPTIONS

       -i interface
              Specify the interface to use.

       -c own|host|both
              Specify which hardware address t use when restoring the  arp  configuration;  while
              cleaning  up,  packets can be send with the own address as well as with the address
              of the host. Sending packets with a fake hw address can disrupt  connectivity  with
              certain  switch/ap/bridge configurations, however it works more reliably than using
              the own address, which is the default way arpspoof cleans up afterwards.

       -t target
              Specify a particular host to ARP poison (if not specified, all hosts on  the  LAN).
              Repeat to specify multiple hosts.

       -r     Poison  both  hosts (host and target) to capture traffic in both directions.  (only
              valid in conjuntion with -t)

       host   Specify the host you wish to intercept packets for (usually the local gateway).

SEE ALSO

       dsniff(8), fragrouter(8)

AUTHOR

       Dug Song <dugsong@monkey.org>

                                                                                      ARPSPOOF(8)