[Bridge] [PATCH] netfilter: Fix br_nf_pre_routing() in conjunction with bridge-nf-call-ip(6)tables=0

Stephen Hemminger shemminger at vyatta.com
Tue Jan 3 16:15:21 UTC 2012

On Tue,  3 Jan 2012 14:26:04 +0100
Richard Weinberger <richard at nod.at> wrote:

> If net.bridge.bridge-nf-call-iptables or net.bridge.bridge-nf-call-ip6tables
> are set to zero xt_physdev has no effect because skb->nf_bridge has not been set up.
> Signed-off-by: Richard Weinberger <richard at nod.at>

I am not sure if this is a valid configuration. The setting of sysctl is saying
"don't do iptables on bridge (since I won't be using it)" and then you are later
doing iptables and expecting the settings as if the iptables setup was being

Instead, you should just enable the net.bridge.bridge-nf-call-iptables sysctl.
If a distro chooses to disable it then you may have to do it explicitly.

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