[Bridge] Bridging partially (rx eth0 -> tx eth1)

[Bridge] Bridging partially (rx eth0 -> tx eth1)

[jhautbois]

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Hi there,

I'm new on the mailing list, but this is not a good reason to be quiet :-).
I'm very interested in the bridging functionnality of the Linux kernel.
I am wondering f it is possible to bridge "partially".

I mean : I would like to have all the traffic from the RX of my eth1 card  
directly sent out through the TX of my eth0 card.
But I would like to receive the frames from the RX of eth0 thanks to a  
PF_PACKET socket.

Is this possible with the bridging system ?
I don't think so, but I haven't foud out the answer...

Thanks in advance !
Best Regards.
JM

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Re: [Bridge] Bridging partially (rx eth0 -> tx eth1)

[richardvoigt]

On Tue, Dec 15, 2009 at 3:32 AM,  <jhautbois@gmail.com> wrote:
> Hi there,
>
> I'm new on the mailing list, but this is not a good reason to be quiet :-).
> I'm very interested in the bridging functionnality of the Linux kernel.
> I am wondering f it is possible to bridge "partially".
>
> I mean : I would like to have all the traffic from the RX of my eth1 card
> directly sent out through the TX of my eth0 card.
> But I would like to receive the frames from the RX of eth0 thanks to a
> PF_PACKET socket.
>
> Is this possible with the bridging system ?
> I don't think so, but I haven't foud out the answer...

ebtables can select which traffic gets bridged.

>
> Thanks in advance !
> Best Regards.
> JM
> _______________________________________________
> Bridge mailing list
> Bridge@lists.linux-foundation.org
> https://lists.linux-foundation.org/mailman/listinfo/bridge
>

[Bridge] Re :Re: Bridging partially (rx eth0 -> tx eth1)

[jhautbois]

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> ebtables can select which traffic gets bridged.

Thnks you for answering.
AFAIK, ebtables works like iptables, but within the L2 layer ?
This means I could eventually send only IP (and VLAN) traffic to the host,  
and forward everything else ?

I am still looking at the doc.

JM

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Re: [Bridge] Re :Re: Bridging partially (rx eth0 -> tx eth1)

[richardvoigt]

On Tue, Dec 15, 2009 at 10:36 AM,  <jhautbois@gmail.com> wrote:
>> ebtables can select which traffic gets bridged.
>>
> Thnks you for answering.
> AFAIK, ebtables works like iptables, but within the L2 layer ?
> This means I could eventually send only IP (and VLAN) traffic to the host,
> and forward everything else ?

Yes, or you can match based on input interface, which solves your
original problem if you rephrase the question "how can I bridge all
packets coming in from eth0 and none coming in from eth1?"

>
> I am still looking at the doc.

look at the -i and --physdev-in options

>
> JM