Mot cach don gian de redirect destination ip address

1. Su dung tinh nang nat cua iptables
e.g. $ sudo iptables -t nat -A OUTPUT -i eth0 -d google.com -j DNAT --to-destination vnexpress.net

nhu vay thay vi ket noi den google, may tinh se ket noi den vnexpress.net

2. Cach flush table da dung de nat truoc do
- sudo iptables -t -nat -F       ---> xoa tat ca
- sudo iptables -t nat -D OUTPUT -d google.com -j DNAT --to-destination vnexpress.net

3. Redirect tren server linux dang dung
iptables -t nat -A PREROUTING -i eth0 -d 74.125.235.66 -j DNAT --to-destination 123.30.129.148