iptables -t nat -A PREROUTING -p tcp -d 0/0 --dport www -i eth0 -j DNAT --to 192.168.1.14:3128

iptables -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination