Re: NAT with forwarding to multiple destinations

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Sorry I didn't specify it. Of course I use UDP protocol, so it is
connectionless.

Alberto


On Thu, Dec 2, 2010 at 1:46 PM, Giles Coochey <giles@xxxxxxxxxxx> wrote:
> On 02/12/2010 13:38, Alberto Quattrini Li wrote:
>
> Hi,
>
> I would like to know if there is any way by using NAT feature to
> forward a message to multiple destinations. I know that there is the
> package TEE, but that works at IP level, and so you can duplicate the
> packet to another host (i.e. specifying another address, but not the
> port). Moreover I know that specifying a range of port in
> to-destination just load-balances the traffic flow within that range,
> so that solution doesn't work.
>
> For example, let's say that I have a server that wants to broadcast a
> message to different clients on the same machine (so identified by
> localhost:port; each client has different port obviously).
> So it would be very easy if the server can send the message to the
> "broadcast port" and when netfilter intercepts it, by matching that
> broadcast port as destination port, netfilter would forward it to
> destinations specified by the rule.
>
> Maybe you just want multi-cast.
>
> You couldn't do this with connection based protocols such as TCP as you need
> to handle each connection differently at higher layers.
>
> --
> Best Regards,
>
> Giles Coochey
> NetSecSpec Ltd
> Email/MSN/Live Messenger: giles@xxxxxxxxxxx
> Skype: gilescoochey
>
>
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