[Openvpn-users] OpenVPN bridging question

[Owain E. <tom...@ya...>]

Hello again!

I've been playing with bridging two networks each with the same subnet to
see if it makes lan gaming easier. So far I've managed to get some of the
way, but I'm still at a loss.

The network setup in my head is as follows:

I have 2 routers Router A and Router B both have the internet connection on
eth0 and the internal network on eth1.

I now place a tap0 tunnel from Router A to Router B (via eth0).

I now bridge tap0 and eth1 together as br0 on both routers and give br0 the
same ip address 192.168.0.1 on both sides.

This tunnel comes up fine, I can ping across the network, but then my
understanding falls appart as I have no idea if my routing tables are set up
correctly, also do I have to give br0 a different ip address on the
different routers.

Or are there mistakes in my script.up below?

Thanks, Owain Evans

#!/bin/bash

#NETWORK A

# Give our bridge a name
BRIDGE=br0
# The internal interface which we want to do the VPN with
INTIF=eth1

ifconfig $1 10.2.0.1 netmask 255.255.255.0 mtu $2

#Create the bridge device
brctl addbr $BRIDGE
#Added the VPN tunnel and the internal interface to it
brctl addif $BRIDGE $1
brctl addif $BRIDGE $INTIF

#Take both tap an int iface down
ifconfig $1 down
ifconfig $INTIF down

#Bring both tap and int iface back up with no ip
ifconfig $1 0.0.0.0 up
ifconfig $INTIF 0.0.0.0 up

#Bring up the bridge device with the chosen ip
ifconfig $BRIDGE down
ifconfig $BRIDGE 192.168.0.1 netmask 255.255.255.0 mtu $2 up