L2 NAT

[ivan <lagigliaivan@xxxxxxxxx>]

Hi All,

I need to connect three devices via ethernet, through a switch, to the
same tftp server. The problem is that these devices have the same IPs,
i.e. 192.168.0.181, and when I address to or get data from one of
them, I can't tell which device I'm actually talking to. The devices
are three items of the same product, and their IP cannot be changed.

I have implemented a perl script that changes the ARP table in tftp
server side, but I need a stronger solution.

I was thinking on developing a sort of L2 NAT which could change the
IP source address of a package according to its MAC address, and put
it in the middle of the tftp server and the devices.

Using the current iptables command can I set up this?? or  I need to
develop my own kernel module???

If you have any idea please let me know.


Thanks.
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