We are being forced to move our servers from one rack in the data center to another - and will have access to our Internet IP block live in both racks. I want to be able to power down a server, move it to the other rack, bring it back up and have it within the original network. Since the racks are 50 feet (15m) apart, I was hoping to do this over the network.
I thought about using an SSH VPN, but this is actually done at Layer 3 (I'm not talking about an SSH point-to-point tunnel). What I really need is a bridge. (There's a good SuperUser question on this.)
The Endian firewall apparently supports a bridged VPN using OpenVPN but the instructions suggest that each side of the VPN has a different network; I'm hoping I'm just misunderstanding the directions. In particular, the section Create the VPN Account Details (Site A) suggests (item 2) that you have to enter the network found on the other side of the "bridge"... which makes no sense to me.
Also, we already have a VPN gateway set up between one of these firewalls and another. I assume that this is not a problem.
I had originally envisioned using two hosts (Ubuntu Server Lucid Lynx) and going through the firewalls.
What is the best way to get these two isolated networks together as one, single network with a single set of IPs?
EDIT: Is there any way to run a bridge across an SSH VPN? Or is that just too strange for words?