I have 3 nics in a NATed gateway file server. Two nics (eth1, eth2) provide dhcp and nfs services to an internal subnet via a dedicated switch. The other nic (eth0) connects to an external WAN switch to provide net access to the systems in the subnet.
--- eth1 WAN switch eth0 --- | SUBNET switch --- eth2
Question: Is it possible to disable the NATing, nfs, dhcp and just somehow bridge the external WAN nic to the internal ones such that it's just a pass through? Basically having the server behave like a switch? Allowing the internal systems to join the network on the WAN. I know how to disable NAT, nfs and dhcp but not how to configure the nics.
I know I could simply unplug eth1, eth2 from the server and plug them into the WAN switch but my goal is to script this so I don't have to physically plug and unplug network cables each time.
Thanks