Re: Bridge and iptables

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On Feb 14, 2008 3:41 AM, Leigh Sharpe <lsharpe@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> Bridged traffic is not seen by iptables. You need ebtables instead.

Bridged traffic is not seen by iptables alone. You need bridge-nf as well.

There, I fixed it for you.

"The br-nf code makes bridged IP frames/packets go through the iptables chains."
http://ebtables.sourceforge.net/brnf-faq.html


>
> Regards,
>              Leigh
>
> Leigh Sharpe
> Network Systems Engineer
> Pacific Wireless
> Ph +61 3 9584 8966
> Mob 0408 009 502
> Helpdesk 1300 300 616
> email lsharpe@xxxxxxxxxxxxxxxxxxxxxx
> web www.pacificwireless.com.au
>
>
>
> -----Original Message-----
> From: bridge-bounces@xxxxxxxxxxxxxxxxxxxxxxxxxx
> [mailto:bridge-bounces@xxxxxxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Sathyan
> M
> Sent: Wednesday, 13 February 2008 5:20 PM
> To: bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Subject:  Bridge and iptables
>
> Hi,
>
> I am using linux kernle-2.6.15, iptables-1.4 and bridge-utils-1.4.
> Everything intslled without any issue and i am able to enable the
> bridge and traffic is also flowing without any issue.
>
> But i did not see any traffic on the iptables forward chain due to
> which i am not able to control the traffic.
>
> Do i requie enable anything more to make the traffic pass through
> iptables forward chain.
>
> Please look into the configuration
> ip addr
> 1: lo: <LOOPBACK> mtu 16436 qdisc noqueue
>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
> 2: tunl0: <NOARP> mtu 1480 qdisc noop
>     link/ipip 0.0.0.0 brd 0.0.0.0
> 3: gre0: <NOARP> mtu 1476 qdisc noop
>     link/gre 0.0.0.0 brd 0.0.0.0
> 10: eth0: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast
> qlen 1000
>     link/ether 00:07:d9:0d:67:5a brd ff:ff:ff:ff:ff:ff
> 11: eth1: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast
> qlen 1000
>     link/ether 00:07:d9:0d:67:03 brd ff:ff:ff:ff:ff:ff
> 12: br0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue
>     link/ether 00:07:d9:0d:67:03 brd ff:ff:ff:ff:ff:ff
>     inet 10.10.5.2/24 brd 10.10.5.255 scope global br0
>
> iptables -L -nvx
> Chain INPUT (policy ACCEPT 4484 packets, 330543 bytes)
>     pkts      bytes target     prot opt in     out     source
>      destination
>
> Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
>     pkts      bytes target     prot opt in     out     source
>      destination
>
> Chain OUTPUT (policy ACCEPT 4105 packets, 2046064 bytes)
>     pkts      bytes target     prot opt in     out     source
>      destination
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