Open VPN Bridge

[xxilus]

I am trying to install openVPN on ubuntu server 10
I am working through https://help.ubuntu.com/community/OpenVPN
but I am running into problems. I think that I configured my network interfaces file incorrectly
/etc/network/interfaces
This is what it looked like before.


auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp



And this is what I tried (and failed) to add the bridge


auto lo br0
iface lo inet loopback

iface br0 inet dhcp
bridge_ports eth0
bridge_fd 9 ## from the libvirt docs (forward delay time)
bridge_hello 2 ## from the libvirt docs (hello time)
bridge_maxage 12 ## from the libvirt docs (maximum message age)
bridge_stp off ## from the libvirt docs (spanning tree protocol)


auto eth0 inet manual
up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down


this is apparently not correct, because it just killed my internet connection.

Can somebody help me write this configuration file?
Also, I does anybody know where I can get documentation on this configuration syntax?
Do you know what books will help me understand this?
what is a network bridge?

[xxilus]

I just tried this. It did not work either.

auto lo
iface lo inet loopback

auto br0
iface br0 inet dhcp
bridge_ports eth0 tap0
pre-up openvpn --mktun --dev tap0

auto eth0
iface eth0 inet manual
up ifconfig $IFACE 0.0.0.0 up
up ip link set $IFACE promisc on
down ip link set $IFACE promisc off
down ifconfig $IFACE down

[xxilus]

I got it working without a bridge.
The instructions in the attached rtf is what worked for me.