Hi!
I have a cluster of UMLs networked together using ethernet bridging
and tun/tap.
I want to connect to a network with the following stipulations:

1) The UMLs (and UML host) have predetermined range of IP addresses on
a wider subnet. These need to stay fixed.

2) I want to firewall off the UMLs to prevent UML users doing nasty
things to the rest of the subnet e.g. setting up a DHCP server that
would be in competition with the real one.

I have created 2 bridges on the host: One to hang the UMLs off and the
other to act as a bridging firewall, but I cant figure out how to
connect the bridges together.
I have an TUN interface added to each: one is called "fw-output" - the
"private side" interface on the bridging firewall, and one on the
bridge the UMLs hang off, called "uplink".

Does anyone know how to get network traffic to pass between fw-output
and uplink? (Or. a better way of solving this problem ;-)

Thanks and best regards!
--
Guy Heatley


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