Linux Command Library
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arpspoof

intercept packets on a switched LAN

arpspoof [-i interface] [-t target] host

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.

-i interface

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

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

dsniff(8), fragrouter(8)

Dug Song <dugsong@monkey.org>

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