help me with ip table

alaios · 09-27-2005, 06:55 AM

Hi plz take a look at the following example

The laptop has 2 ethernet interfaces
To eth1 comes traffic from src 143.233.222.253
The eth0 has ip address 10.2.4.2 and it is connected back to back with eth1 of other pc with ip address 10.2.4.1
I want to forward the traffic with src 143.233.222.253 to the 10.2.4.1 pc and if it works i will redo this for a second pc so as to l send the traffic to a third on.
Can u help me plz?

alaios · 09-27-2005, 07:41 AM

I have tried this one
iptables -t nat -A PREROUTING -i eth1 -s 143.233.222.253 -j DNAT --to-destination 10.2.4.1
i have also set the
/proc/sys/net/ipv4/ip_forward to 1
but still i cant see any trafiic to eth0 interface (ip 10.2.4.2)

alaios · 09-27-2005, 08:05 AM

I have also tested this one
iptables -t nat -A PREROUTING -p tcp -d 143.233.222.77 (laptop eth1 card) --dport 22453 (i have cheched dst port with tcpdump) 00 -j DNAT --to-destination 10.2.4.1
this still doesnt work
Every time i try to apply a new rule i use first
the iptables -F
iptables -t nat -F command