> Is there a way to configure Linux to forward packets only if the IP
> address validates against a IP address-to MAC table?
>
> I have several machines which have priviledges based on their IP
address
> like higher bandwidth, outgoing SMTP, etc. Now it is entirely
possible,
> that when any of these machines are down (typcally at the end of the
> day or early morning), someone in the office can statically set
their
> IP address to any of these and enjoy these priviledges.
>
> How do I validate IP addresses before routing? I know I can do this
by
> creating a userspace netfilter process which marks packets after
> validation, but is there any out of the box solution?
>
> - Sandip
...And then there's always
http://www.die.net/doc/linux/man/man8/arptables.8.html
Regards,
Komal
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