Bridging problems after Upgrade to Lenny
Hello all,
I subscribed newly to this list, since I got an bridging problem
after an upgrade from Debian etch to Debian lenny (before
everything worked fine).
The situation is as follows:
# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.000347729835 no eth0
tap0
tap0 is associated with an OpenVPN tunnel.
The strange thing now is the following:
Packets from eth0 to IP addresses within tap0 pass the bridge and reach
the destination (the other side of the OpenVPN tunnel).
But packets from the other side of the OpenVPN tunnel do not reach
destinations behind eth0. I think this is not an OpenVPN problem, since
I can see packets, as described here, using "tcpdump -i tap0" and also
using "tcpdump -i br0". But I do not see them using "tcpdump -i eth0".
The only thing which happens is that there are sometimes packets like
this on eth0: "igmp v3 report, 1 group record(s)" (from tcpdump) with
source address the one from the OpenVPN client. I do now know where
these packets come from.
There is no firewall activated.
A few information about my system:
- Debian lenny
- Linux 2.6.18-6-686 (Debian Kernel from etch, I had problems booting the
newer one from lenny)
- bridge-utils 1.4-5
Any ideas what might be the reason for this and how to solve it?
Best regards
Udo
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