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List:       busybox
Subject:    Looking for VPN and networking assistance
From:       Eric Bautsch <eric.bautsch () pobox ! com>
Date:       2013-10-18 20:50:23
Message-ID: 52619F0F.4040305 () pobox ! com
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My apologies if this is not the right forum to ask this question.... Please 
point me to a better place.

I'm struggling to work out what I have forgotten here.
I basically have a piece of ethernet between two buildings. Each building has a 
WRT54G with openwrt at each end running busybox 1.15.3. The ethernet is 
connected to a bridge call br-cable (192.168.40.0/24) which also includes the 
wireless interfaces on the WRT54G.
Furthermore, each wrt54g has three additional network ports br-lan 
(192.168.140.0/24), br-phone (192.168.150.0/24) and br-cam (192.168.20.0/24). 
They each have an IP on those networks and they can be pinged as expected locally.
In order to span those networks across the two buildings, I have created three 
openvpn servers on one of the routers and three openvpn clients on the other. 
Those vpns connect as expected. They are running across tap0, tap1 and tap2. 
Those tap devices are part of the bridges:
bridge name     bridge id               STP enabled  interfaces
br-lan          8000.001217c6dc1f       yes             eth0.0
                                                         tap0
br-wan          8000.001217c6dc1f       yes             eth0.1
br-cable                8000.001217c6dc1f       yes  eth0.4
                                                         wl0
br-camera               8000.001217c6dc1f       yes  eth0.3
                                                         tap2
br-phone                8000.001217c6dc1f       yes  eth0.2
                                                         tap1

(Note: br-wan is not used)

I would now expect to be able to ping from a device on say the "lan" network 
192.168.140.0/24 in one building to another device on the lan network in the 
other building. Alas, this is not the case.
What am I missing? Any pointers greatly appreciated.
(Oh, the tap interfaces are in promiscuous mode)

Thanks.
Eric






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