I have an Ubuntu server with 3 NICs installed. I have two classrooms. I want to control the two classrooms with IPtables separately. My problem is that I can't (bridge eth0 to eth1) and (bridge eth0 to eth2) at the same time. I'm reading all articles on the internet since a month. Can't get it to work. So what I want is simply something like this: eth0 >>> eth1 = br1 eth0 >>> eth2 = br2
So this way the 2 classrooms won't be detached from the outer network and the central DHCP.
And I can write IPTable rules to br1 and br2 separately.
PS: DHCP is not an option. I need the subnet to stay the way it is.