duplicate outgoing packet using iptables

I need to duplicate outgoing dns packets to another gateway?


eth1

|

|
/
\
/
\
/
\
/
\
wan1
wan2
/
\
/
\
/
\

if dns reply goes to wan1 duplicate and route also to wan2
How do I do that using iptables v1.3.5 ?

On Jul 13, 4:34 pm, "del...@gmail.com" <del...@gmail.com> wrote:
> I need to duplicate outgoing dns packets to another gateway?
>
> eth1
>
> |
>
> |
> /
> \
> /
> \
> /
> \
> /
> \
> wan1
> wan2
> /
> \
> /
> \
> /
> \
>
> if dns reply goes to wan1 duplicate and route also to wan2
> How do I do that using iptables v1.3.5 ?

Can you give more description of what you want to do ? First of all
how many interfaces your device has and onto which(like wan1 or
wan2) ?
Also you want to redirect or you want to use --continue using
iptables so that packet mangling does not drop packet at wan1 itself?

--Krish