Re: forward udp broadcast packets on same subnet /interface with diff source

[George Alexandru Dragoi <waruiinu@gmail.com>]

One more thingg, you'll have to set ip_forward to 1

On Tue, 13 Jul 2004 22:02:47 -0700 (PDT), Tom Thumb
<tomthumb888@yahoo.com> wrote:
> Hi,
> 
> Can I use iptables to forward UDP broadcast packets on
> the same subnet and interface but just change the
> source IP?
> 
> That is, the forwarding machine is 192.168.1.5, with
> mask 255.255.255.0 and has a single NIC.
> 
> A machine with IP 192.168.1.6 with the same mask sends
> a UDP broadcast to 192.168.1.255.
> 
> The forwarding machine receives this packet. Can it be
> configured to resend it out on the same interface that
> it received it on (its only interface) and just change
> the source IP to be a 3rd address, like 192.168.1.7,
> but also as a UDP broadcast to 192.168.1.255?
> 
> Is there any way to do this without adding a physical
> NIC?  Do I need to add a "virtual" NIC to do it? How?
> 
> Thanks
> 
> 
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