On Thu, May 12, 2005 at 09:16:23PM -0700, cranium2003 wrote:
> Hello,
> Is there any way on linux routers to know on
> which interface packet is forwarded before actually
> packet trasmission begins? Also before packet
> processed by IP layer can it be possible to know from
> which adjecent Router'IP packet came to that router?
> regards,
> cranium
I think the OUTPUT chain in iptables already knows what the outbound
interface is, so you could make a decision based on that.
I think you can use the mac target in the PREROUTING chain to get access
to the source MAC address.
I think all of your answers are in iptables.
>
>
>
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James R. Leu
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