bridge_packets 0 and bridge

Jouni Malinen jkmaline at
Mon May 31 23:54:43 EDT 2004

On Fri, May 28, 2004 at 11:06:12AM +0200, Karel Rericha wrote:

> with 2.6.3-4 kernel and hostap 0.2.0. In shorewall's "interfaces" file I 
> have specified
> "routeback" option, to enable traffic between eth0 and wlan0:
> loc   br0   detect   maclist,routeback

Do you have a pointer to explanation of "routeback" option? I'm not
familiar with Shorewall and do not know what to expect from that

> all traffic between wlan0 clients disappear. I looks like "routeback" is 
> routing only between
> different interfaces, and not from wlan0 back to wlan0.

Linux bridging code does not send packets back to the same interface, so
unless Shorewall has a patch for this part, setting bridge_packets=0
will break the direct connection between associated clients. The change
to Linux bridging code should be minimal, but these have not yet been
included in the kernel distribution.

Jouni Malinen                                            PGP id EFC895FA

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