Re: Multiple NAT router
- From: Brian Candler <B.Candler@xxxxxxxxx>
- Date: Mon, 24 Jul 2006 10:09:09 +0100
On Fri, Jul 21, 2006 at 11:13:47AM -0600, Brett Glass wrote:
I have an application in which I'd like a FreeBSD router to have
multiple, isolated LANS attached to it, each with the same address
space. The FreeBSD box would take the place of multiple NAT routers.
For example, I might want to have three internal Ethernet
interfaces on the FreeBSD box. Each would be connected to a LAN
whose internal addresses are 192.168.0.0/24. The FreeBSD box would
do NAT for all of them, and of course they could not "see" one another.
FreeBSD won't support this 'out of the box' - because of the problem that
you identified of having multiple NICs all with the same address range
assigned to them.
There's a project called 'vimage' which adds a separate virtual forwarding
table per jail. This might work for you, although all the natd's "outside"
interfaces would need to sit on the same interface, and I don't know if it
can do that.
Otherwise - you can run multiple instances of FreeBSD under a virtual
machine environment like Xen or VMware, and bridge all the 'outside'
interfaces together onto the same NIC.
Also - you may still end up with a separate outside IP per vimage or VM, so
maybe then you need another NAT instance to NAT all of those onto a single
IP address :-)
Regards,
Brian.
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