Re: Iptables: Matching packets leaving a bridged interface

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Jamie Cockburn a écrit :
> 
> Couple of follow-up question then!

All the answers (and much more) are in the ebtables manpage.

> 1: Do you know if by the time it reaches ebtables -> filter -> output that the packet will have a PHYSOUT (or equivalent) set?

Yes. See man ebtables, -o.

> 2: Will I be able to differentiate between packets for eth0 and eth1 (when the bridge doesn't know which specific interface it should send it on).

Yes. The bridge knows where it sends packets.

> 3: I'm guessing that by the time the packet hits ebtables -> filter -> output, that it will have lost its IN/PHYSIN?

Yes. See man ebtables, -i.

> 4: If that is the case, would something like this work:
>       - In iptables -> filter: -A FORWARD -i eth2 -o br0 -j MARK --set-mark 1234
>       - In ebtable -> filter: -A OUTPUT -physdev-out eth0 --m mark --mark 1234 -j DROP

Yes. See man ebtables, mark.
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