I did not however know about '-m physdev --physdev-in'
That may be the ticket! 8-)
Will report...
ET
Michael Butash writes:
> I was curious too as usually not ever doing bridging within linux, and not
> to be an arse, but googling "iptables bridge filter" for you seemed to
> turn up interesting results first:
>
> http://serverfault.com/questions/607224/iptables-matching-packets-for-brid
> ged-interface
>
> I never knew about ebtables myself, so great question none the less.
>
> -mb
>
>
>
> On 12/23/2015 01:20 AM, kitepilot@kitepilot.com wrote:
>> Hello there...
>> I have a 2-nics Linux box configured as a bridge 'br0'.
>> World comes in via either nic (eth0 or eth1) and network is fed via the
>> other nic (eth1 or eth0 depending on above, should be irrelevant).
>> I have a non trivial question and PLEASE avoid the 'use iptables' answer
>> unless you know what rule to apply to which chain and on which interface
>> (eth0/eth1/br0).
>> Non trivial question is:
>> How do I block specific IP addresses/networks from traversing the bridge?
>> Or in other words:
>> I want all connections from a particular address/subnet to be DROP(ed) in
>> that bridge.
>> Neither FORWARD nor INPUT will catch the packet in br0 because it is
>> neither addressed to the box not NAT(ed), and apparently neither eth0 nor
>> eth1 will hand packets to netfilter.
>> Thanks.
>> ET
>> PS: Merry Xmas to all... :)
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