I have followed various guides on how to do Man in the Middle Attack, but I have not been able to successfully do them because as soon as I run the arpspoof command the victim's internet access drops.

I have tried on different computers but the problem continues. The only solution I have found is to do the attack using the live cd rather then through the harddrive installation.

Any ideas on why this is happening or tips on solving it would be greatly appreciate it.

######The following are the steps that I take ######
echo '1' > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A PREROUTING -p tcp --destination-port 80 -j REDIRECT --to-port 8080
arpspoof -i wlan0 -t
After sending the above command the network drops.