arpspoof

Poison all hosts for target

$ sudo arpspoof -i wlan0 host_ip

$ sudo arpspoof -i wlan0 -t target_ip host_ip

$ sudo arpspoof -i wlan0 -r -t target_ip host_ip

arpspoof [OPTIONS] host

arpspoof forges ARP replies to intercept network packets. It sends fake ARP responses to redirect traffic through the attacker's machine, enabling man-in-the-middle attacks for network analysis and security testing.

-i interface

Network interface to use

Target IP address to poison (poisons all hosts if omitted)

Poison both target and host (bidirectional)

IP address of the host to impersonate (usually the gateway)

This is a penetration testing tool that can disrupt network traffic. Only use on networks you own or have explicit authorization to test. Requires root privileges and IP forwarding enabled for traffic to flow.

arpspoof is part of the dsniff package, a collection of network auditing tools for penetration testing and security analysis.

dsniff(8), tcpdump(8), ettercap(8)