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ARP (Address Resolution Protocol) Spoofing

Last modified: 2022-11-22

ARP is used to find another computer’s MAC address based on its IP address.

Basic Flow

  1. Check Interface and Gateway IP Address

    # Interfaces
ip addr

# Default gateway
ip route list

  2. Scan the Network to Find Target IP

    nmap -sP <gateway-ip>/24
nmap -sP <gateway-ip>/16

  3. Enable IP Forwarding

    # Allow all forwading in the LAN
# -A: append rules
# -i: interface
# -j: jump
iptables -A FORWARD -i eth0 -j ACCEPT

Find MAC Address

cat /sys/class/net/eth0/address
cat /sys/class/net/enp0s3/address
cat /sys/class/net/tun0/address