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From: "Renato Marques" <renato_fbsd@optrade.com.br>
To: "Renato Marques" <renato_fbsd@optrade.com.br>,
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References: <40D3752A.8000809@atopia.net> <006301c4558a$4b8b88a0$2101a8c0@p4>
Date: Fri, 18 Jun 2004 20:29:57 -0300
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Subject: Re: Redirection with a bridge ?
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    Well, in the TCP/IP Model, IP is layer 2 and TCP/UDP layer3.


> I dont think a bridge could do some like that. A bridge see only IP
> packets, where are no information about ports, ports are used in TCP and
> UDP.
>     Actualy, I think Layer 3 is where the IP protocol besides. NAT is done
> on layer 4... but i could be wrong...
>
>
> > Hello all,
> >
> > Is there a way to do IP redirection without using layer 3? (IPNAT or
> > routing)?  I have a bridge setup and want to redirect any port 80
> > traffic outgoing through the bridge to a specific server .... but it
> > seems I can only do this with ipfw's forward/fwd or ipnat's rdr commands
> > ... which are all layer 3 oriented and dont work with just a bridge...
> >
> > Any ideas?
> >
> > Thank you in advance for anyone's help,
> >
> > Matt
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