[Bridge] [ebtables]Explanation of the packet flow...

Bart De Schuymer bdschuym at pandora.be
Sat Jan 16 03:53:04 PST 2010

Jean-Michel Hautbois schreef:
> Hi everybody !
> I am trying to understand the "PacketFlow.png" image from the website.
> I have several misunderstanding, especially on the "Bridging Decision" circles.
> I would like to understand which way a packet takes when the rule on
> -A INPUT -j ACCEPT is on, for example. When looking at the packet
> flow, I would say it is going to the "routing decision" circle, but, I
> am not sure...
It is handed to the IP layer, which includes a routing decision.

> I would also like to understand what is necessary in order to have a
> packet transparently directed from one interface to the other. I would
> say that only the "-A FORWARD -j ACCEPT" rule is necessary, but
> Wireshark doesn't agree with me...
Ebtables is used to filter bridged traffic. You can't use ebtables to
direct a packet to another interface.


Bart De Schuymer

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